This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

The goal of this middle school science fair project is to examine the effect of caffeine on plant growth.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

Which public places harbor the most bacteria and germs? Test different environments to find out where the most bacteria live in this science project.

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

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

This project examines Newton's First and Second Laws of Motion with a bicycle and water balloons.

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

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

Looking for a fun project on energy? Check out this fun elementary school science fair project idea that demonstrates chemical energy in a bottle.

Discover whether the color of text correlates with ease and speed of reading.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Research history of programming language. Design a new or improved programming language. Create a display that illustrates the features and improvements.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

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

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

Learn about the Atwood Machine and Newton's 2nd Law with a pulley and masses of different weights in this physics science project.

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

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

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

Find out which type of sponge holds the most water.

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

see whether all liquids evaporate at the same rate. In other words, does water evaporate at the same rate as juice?

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

What colors can dogs see? Do they only have black and white vision, or can they see other colors too? Find out in this cool science experiment!