Do human lie detectors exist? Charge up your powers of observation to see if you can tell a lie from the truth.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

Science fair project that demonstrates that rotting food attracts insects that lay eggs on it.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

This project examines germs and their spread in households. The goal is to learn how to stop the spread of germs and other diseases.

Do you hate to waste energy? In this experiment, you will design a machine that is powered by the process known as energy transformation.

This science fair project idea examines the differences between bottle water, filtered water, and tap water.

Design a livable building that functions without electricity. Consider necessities, comforts and entertainment. Build a scale model of your design.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

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.

The project investigates how friction affects motion by using different surface textures.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

The goal of this science fair project is to attempt to build a perpetual motion machine and analyze the Laws of Thermodynamics.

High school students recreate Michael Faraday's experiment in this cool science fair project that induces current in a coil of wire.

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 experiment investigates if small changes in your diet can alter your basal body temperature.

Design and build an invention inspired by Rube Goldberg's designs. Build your invention. Test the machine, write a detailed report.

This science fair project idea determines whether dogs can be trained faster using a food reward or praise.

How fast is the wind blowing? This science experiment provides step-by-step instructions to help you answer this question.

This project investigates whether chewing gum can help a majority of people with focus and concentration.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

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

This science fair project idea determines what household items are good conductors of electricity.

There is debate about whether chalkboards or whiteboards are better. This experiment explores which leads to better retention of visually-displayed information.

In this project, waves of vibrations are experimented with using water in glasses.

This experiment explores how listening in to a one-sided conversation affects concentration.

This science fair project idea determines what household items are good conductors of electricity.