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

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

This science fair idea project identifies the active ingredients in soap and experiments with the properties of soap.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

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.

Your child will learn science and make a fun new malleable toy with this balloon sandbag science experiment.

This taste buds science experiment demonstrates how strongly our sense of smell controls what we taste.

This science fair project idea examines liquids of different densities.

This science fair project teaches students the differences between fruits and vegetables.

This science fair project idea investigates how color affects temperature.

This science fair project idea explores the egg's thin membrane.

This science fair project idea identifies trees using a dichotomous key.

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

This science fair project idea produces varying pitches of sound.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

This science fair project idea examines the reason boats are shaped and engineered.

This science fair project idea compares biodiversity between drops of water.

This science fair project idea researches the effects of acid rain on plant growth.

This science fair project idea explores the different properties of matter.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

In this science fair project, students make their own rain gauge to measure rainfall.

This science fair project will help students learn about non-vascular plants, such as mosses.

This science fair project idea discovers which brand of bubblegum produces the largest bubbles.

This science fair project idea investigates how magnetism can defy the force of gravity.

Wondering how we know that air is there? Here's a quick and easy experiment that proves that air may be thin, but it's not too wimpy to block your shot!

This science fair project idea produces sounds by creating vibrations using different objects.

This science fair project idea experiments with spinning color wheels and optical illusions.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.