K-4 Science Showcase
K-4 Science Showcase
The Toronto Science Fair invited teachers of Kindergarten to Grade 4 to organize class science projects or small group science projects during the winter term. They were then invited to have students make a one-minute video to record what they investigated and what they discovered. Many teachers and students took up this challenge and submitted their videos to the Toronto Science Fair Science Showcase. Follow the links below to view their discoveries.
This is a showcase of science at the Kindergarten, Primary and Junior level, not a competition. TSF hopes that this experience will encourage our younger students to continue to investigate scientific questions.
VOLCANO
Preschool - La Citadelle International Academy of Arts and Science
Question: What is inside a volcano?
Students demonstrated a volcano eruption using 5 materials:
- Water
- Soap
- Food Colouring
- Baking Soda
- Vinegar
Conclusion: Volcanoes erupt with 'hot lava'.
Flotter et couler
Kindergarten - La Citadelle International Academy of Arts and Science
Light objects often float. Heavy objects often sink. But shape is also important. If an object has air inside, it can float. That is why a big, heavy boat can float on water.
Exploring Surface Tension with Magic Milk
Kindergarten - SLI The Sidney Ledson School
Senior Kindergarten students at SLI The Sidney Ledson School explored the science behind the Magic Milk experiment by investigating what happens when dish soap is added to milk with food coloring. Students learned that milk contains tiny particles called molecules, including fats and proteins. The surface of the milk has a force called surface tension, which acts like a thin “skin” holding the milk together. When dish soap was added, the soap molecules were attracted to the fat molecules in the milk. As the soap interacted with the fat, it disrupted the surface tension and caused movement. This movement pushed the food coloring around, creating swirling patterns. Through this hands-on investigation, students were introduced to molecules, surface tension, and basic chemical interactions in an engaging way.
Exploring Friction
Kindergarten - Fieldstone Day School
The Kindergarten students at Fieldstone Day School have been learning about forces. The students used their knowledge of how things move to make predictions and infer results of their Moving Car experiment. The students engaged in three tests to see which material has more or less friction when a toy car drives over it. After making predictions, the students then discussed why one car moved further than the next. They concluded that materials more smooth have the car move further, and materials with more friction stop the car from moving as far.
Les avions en papier
Grade 1 - La Citadelle International Academy of Arts and Science
During this fun experiment, the students in Grade 1 had fun making their 3 types of paper airplanes and testing them out. They have realized that certain planes can go further than others.
Comment les animaux restent au chaud?
Grade 1 - La Citadelle International Academy of Arts and Science
Our Grade 1 students investigated how animals stay warm in the winter. They have discovered that increasing the amount of fat in their bodies helps animals stay warm in the winter and thus survive during this difficult time.
Make a Bouncy Egg!
Grade 1 - Seerah Mission School
The bouncy egg experiment shows what happens when an egg sits in vinegar. When we put a raw egg in vinegar and leave it for about two days, the shell slowly disappears. The vinegar breaks down the hard shell. After the shell is gone, the egg feels soft and rubbery. It can even bounce a little! This happens because only the stretchy membrane around the egg is left. This experiment teaches us that vinegar can react with the egg shell and change it. It also shows how some liquids can change materials.
Make a Model of a Habitat
Grade 1 - Fieldstone Day School
Grade 1 students explored the importance of habitats by creating a model of an animal and its habitat using clay and construction paper. Students chose an animal and designed a habitat that met its basic needs, including shelter, food, and water. Through building and discussion, students investigated how habitats help animals survive by providing a safe place to live, find food, and access water. Each student explained how their habitat supported their animal and why it was important for the animal’s survival. This hands-on project encouraged students to think carefully about the relationship between animals and their environments while developing their creativity and understanding of living things. The activity helped students build early science skills by observing, designing, and communicating their ideas about how habitats support animals in nature.
Screen Sense
Grade 1 - Homeschool
Screen Sense is a mobile app designed by Mohammad Abd-Ur-Raafe that intends to help families to build healthier digital habits in an empathetic, cooperative way. The app gently reminds children when they use devices during “no-screen” hours and, if usage continues, sends a subtle alert to parents after two minutes. This two-step approach encourages children to self-regulate before parental involvement, promoting responsibility and mutual trust.
Investigating Archimedes' Principle
Grade 1 & 2 - SLI The Sidney Ledson School
Grade 1/2 students from SLI The Sidney Ledson School explored Archimedes’ Principle by comparing how eggs behave in plain water and salt water. They learned that a fluid pushes upward on objects with a force called buoyant force, which depends on how much fluid the object displaces. In their experiment, an egg sank in plain water but floated in salty water because salt increases water’s density, making the buoyant force stronger than the egg’s weight. This hands-on activity helped them understand why some objects float while others sink.
Isolant ou conducteur?
Grade 2 - La Citadelle International Academy of Arts and Science
The Grade 2 students carried out an investigation on electricity by testing a variety of materials. Through their experiments, they discovered that some materials do not transmit electrical energy well, while others do. They observed that when a material allowed the current to pass through it, the circuit was completed and the lightbulb lit up.
The Magic of Breathing
Grade 2 - Seerah Mission School
This project shows how breathing works using a simple lung model. The model was made with a bottle, straws, and two balloons. One balloon represents the lungs, and another balloon represents the diaphragm. When the bottom balloon (diaphragm) is pulled down, the balloon inside the bottle (lungs) fills with air and gets bigger. When the bottom balloon is pushed up, the lung balloon gets smaller as the air goes out. This model shows how the diaphragm helps the lungs move air in and out of the body when breathing.
Make a Layered Filter
Grade 2 - Fieldstone Day School
Grade 2 students designed and built a layered water filter to investigate how solid materials can be removed from dirty water. Students carefully observed the dirty water, noting the size of the solid pieces and thinking about which materials and hole sizes would best stop the solids from passing through. Using a large plastic bottle cut in half, they created a filter with layers of fabric, cotton wool, sand, gravel, and stones, ensuring each layer covered the one below it. Students drew and labelled a diagram of their filter and built a working model. Before testing, they recorded a prediction about how clean they thought the water would be after passing through the filter. After testing their filter, they compared the results with their prediction and discussed whether their ideas were correct.
Le serpent dansant
Grade 2 - La Citadelle International Academy of Arts and Science
Through their investigation, the Grade 2 students discovered that some materials produce static charge more effectively than others. By experimenting with a variety of items, they observed which ones were better at building up static and attracting lightweight objects.
What Happens to a Gummy Bear in Different Liquids
Grade 2 - Seerah Mission School
This experiment tested what happens to gummy bears when they are placed in different liquids: water, vinegar, oil, and milk. One gummy bear was placed in each liquid and left overnight. The next day, the gummy bears were observed and compared. The gummy bear in water grew the most and became softer. The gummy bear in vinegar also grew bigger and very soft. The gummy bear in milk grew a little. The gummy bear in oil did not change very much. The results show that gummy bears can absorb some liquids, which makes them grow.
Growing Plants
Grade 2 & 4 - Seerah Mission School
This project explains how plants grow and why they are important. Plants need water, sunlight, air, and soil to grow. Seeds are planted in soil and, with the right conditions, they begin to sprout and grow into plants. As plants grow, they make their own food using sunlight. This helps them grow strong and healthy. Plants are important because they give people and animals food and produce oxygen that helps living things breathe. They also help keep the Earth healthy.
Rainbow Bouncing Egg
Grade 2 & 3 - Seerah Mission School
This experiment shows how osmosis works using a rainbow bouncing egg. The egg is first placed in vinegar to remove the shell, leaving the soft egg inside. Then, the egg is put into cups with colored water. The egg absorbs the colored water through its thin membrane. This process is called *osmosis*, which is when water moves from one place to another through a thin layer. The egg changes color as it soaks up the water. After absorbing the colors, the egg becomes soft and bouncy. This experiment helps show how osmosis works and how water can move into living things.
Des bulles partout!
Grade 3 - La Citadelle International Academy of Arts and Science
Comparaison de deux lampes à lave maison : vitamine C vs bicarbonate de soude et vinaigre. Le bicarbonate devrait produire plus de bulles et être plus lumineux.
Fruit Clock
Grade 3 - Seerah Mission School
This experiment shows how fruit can make electricity to power a small digital clock. Copper and zinc metals were inserted into the fruit, and wires connected them to the clock. The fruit produced a small electric current because the acid inside reacted with the metals, creating electricity. The clock turned on using the electricity from the fruit. This experiment shows that fruit can be used to make simple electricity in a fun and easy way.
The Heart: How it pumps blood
Grade 3 - Seerah Mission School
The heart is an important organ in our body. It works like a pump that moves blood all around the body. Blood carries oxygen and nutrients that our body needs to stay healthy. In this model, the glass with red water represents blood. The straws represent blood vessels that carry blood to and from the heart. The balloon on top represents the heart muscle. When the balloon is pressed and released, it pushes the red water through the straws. This shows how the heart squeezes to pump blood through the body and then relaxes to fill with blood again. The heart beats all day and night to keep us alive and healthy.
Light Up a Paper Circuit
Grade 3 - Seerah Mission School
This experiment shows how a paper circuit can light up a small lamp. Copper tape was placed on paper to make a path for electricity. A battery was connected to the copper tape, and a small lamp was added to complete the circuit. When the battery was connected, electricity flowed through the copper tape and lit up the lamp. This experiment shows how circuits work and how electricity can travel through different materials to power objects.
Make a Model of Arm Muscles
Grade 3 - Fieldstone Day School
Grade 3 students designed and built a working model of a human arm to investigate how muscles help the body move. Using thick cardboard, scissors, a split pin, staples, and two elastic bands (one longer and one shorter), students created a model showing how muscles attach to bones at a joint. Through hands-on experimentation, they demonstrated that muscles do not push bones but pull them by contracting and relaxing. When the elastic “muscle” shortened, it pulled on the cardboard “bones,” causing the arm to move, clearly modeling muscle contraction and relaxation. This experiment allowed students to actively test and observe how muscles work in pairs to create movement. The project strengthened students’ understanding of the relationship between muscles, bones, and joints while encouraging scientific thinking, problem-solving, and the accurate use of scientific vocabulary.
Quelle couleur absorbe la chaleur
Grade 3 - La Citadelle International Academy of Arts and Science
Étude de l’influence de la couleur des récipients sur la chaleur de l’eau. Le noir devrait retenir le plus de chaleur.
Which Cleaner Removes Ketchup Stains Best?
Grade 3 & 4 - SLI The Sidney Ledson School
Students from Grade 3 and Grade 4 at SLI The Sidney Ledson School investigated which cleaner removes ketchup stains best from white cloth. They tested five cleaners: baking soda, white vinegar, hand soap, rubbing alcohol, and water as a control. They also used the same white cloth, equal amounts of ketchup, and the same application and wiping methods. Only the type of cleaner varied to ensure a fair test. After applying each cleaner and wiping consistently, they scored the remaining stains on a 0-5 scale. Their results showed that alcohol was the most effective at removing ketchup. The experiment demonstrated fair testing and controlled variables.
AirLens
Grade 4 - Homeschool
AirLens is a low-cost Arduino-based device that measures invisible pollutants like PM1, PM2.5, PM10, and harmful gases using PMS5003 and MQ135 sensors. Tested in real locations—from schools to traffic zones—it discovered that local pollution levels can be two to three times higher than citywide air quality averages. By showing that “clean air” on reports doesn’t always match neighborhood reality, AirLens empowers students and communities to understand and act on their own air quality data.
La bataille contre la saleté
Grade 4 - La Citadelle International Academy of Arts and Science
Ce projet montre quels liquides naturels nettoient le mieux les surfaces sales. Il nous permet aussi de comprendre les différentes réactions chimiques entre ces liquides et la saleté. Nous avons testé ces liquides sur des pièces de monnaie pour voir lequel fonctionne le mieux.
Earth's Filter
Grade 4 - Lambton Kingsway JMS
The question was asked, how does the Earth produce clean groundwater? What does that natural filtration system look like and how does it work? Dirty water filters through all the layers of the soil and ends up clean. The order of the layers is also important because the big rocks are on top and trap the big particles that are in the dirty water, the sand traps smaller particles and the charcoal cleans the water and removes odors and chemicals and lastly the cotton keeps dirt and dust from staying in the water.
The Electric Circuit
Grade 4 - Seerah Mission School
An electric circuit is a path that lets electricity flow to make devices like light bulbs work. It has a battery for power, wires to carry electricity, a device that uses electricity, and a switch to turn it on or off. Electricity flows in a closed circuit and stops in an open circuit. Circuits can be series, with one path, or parallel, with multiple paths.
Faites tourner votre moteur
Grade 4 - St Bonaventure Catholic School
On se trouve les moteurs électriques simples partout dans la maison. Comment fonctionnent-ils? Un moteur électrique simple est un essieu qui fait tourner. Il est composé de deux aimants qui s'interagissent. L'attraction et la répulsion des aimants créent la rotation. Un aimant est permanent (fixe ou statique) et l'autre est temporaire (électromagnétique). Cette expérience examine si la puissance d’un moteur simple électrique change quand le nombre des aimants augmentent.
Investigate How Well Sound Travels Through Different Materials
Grade 4 - Fieldstone Day School
Grade 4 students conducted an investigation to explore how well sound travels through different materials. Using the same sound source throughout the experiment as the control variable, students tested how sound traveled through a variety of materials, including air (gas), water (liquid), and solid materials such as a book. The independent variable was the type of material tested, while the dependent variable was the loudness of the sound heard. Students worked collaboratively to listen carefully, measure relative loudness, and record their observations in a results table. After analyzing their data, students concluded that sound travels most effectively through solids, followed by liquids, and least effectively through gases. This investigation helped students develop an understanding of sound energy, variables, data collection, and how different states of matter affect sound transmission.
La lumière sur le basilic
Grade 4 - La Citadelle International Academy of Arts and Science
Étude de l’effet des couleurs de lumière sur la croissance du basilic pour trouver la meilleure méthode de jardinage intérieur.
Rainbow Rain
Grade 4 - St Bonaventure Catholic School
In their Rainbow Rain experiment, grade 4 students tested whether different cooking oils change how food coloring falls through water. They used three oils: grapeseed oil, olive oil, and coconut oil. First, they mixed red, yellow, and blue food coloring into each oil. Then they poured the oil mixtures into cups of water and timed how long it took for the first drops of color to fall.
They discovered that the oils behaved differently. Thinner olive oil made the colors fall faster, followed by medium grapeseed oil, while thickest coconut oil made larger drops that fell slowest.
This experiment connects to animal rescue because oil spills can harm birds and ocean animals. Understanding how oil behaves in water can help scientists clean spills more effectively and protect wildlife.
The Science Behind Aerodynamics
Grade 4 - RH McGregor Public School
I am describing the four main forces of aerodynamics. My project will show how a plane can take off and stay in the air.