Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

The project determines determine if a sports drink affects the heart rate of a student athlete during exercise.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

The science project fair idea explores the interaction between your nose, mouth, and brain when tasting a new food or drink.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

This project examines whether people's taste perception is influenced by what they see.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

This project examines if computer screen and text color affect retention and if people subconsciously prefer combinations of colors that help their retention.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

This science fair project idea identifies clouds as a means of predicting the weather.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.