Can you fool your eyes and your brain with an optical illusion? The purpose of this science fair project is to demonstrate various kinds of optical illusions.

With Halloween right around the corner, find a way to use your brain and reward your tummy with a new type of science -- candy science!

Is it a square or a circle? See if you can trick your friends with this zany science project!

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

In this project children practice the scientific method while playing with puffy paint.

How do organic materials become soil? This science experiment measures what materials biodegrade.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.

Get ready for a yummy taste test! Just pour the milk -- and make sure you have some chocolate chip cookies on hand.

Word color association is just a fancy way to talk about the way we connect colors with words.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

This classic children's game demonstrates how sound travels through air vs. through a solid.

Plants and light seem to be good buddies, but how far does the friendship really go?

This simple project makes young children aware of their sense of smell and its capacity for providing them with information about their world.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

This science fair project idea investigates if fats add to the flavor of food.

This science fair project teaches students about wilting and browning of salad greens.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

The objective of this science project is to determine the length of time for different seeds to germinate.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

This science fair project examines how seeds hitchhike on animals and clothing.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.