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

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

Magnets may hold up papers on the fridge, but is it the paper that attracts them? Find out more with this kindergarten science investigation.

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

Check out this cool science fair idea on why hard fruits become soft and learn how to compare the sugar content between ripe and unripe fruits.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

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.

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

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

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

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

Demonstrate the relationship between mass, volume and density. Measure displaced water, and weigh object to calculate mass and density.

Build a magnetic linear accelerator using a ruler, neodymium magnets, and small metal balls in this fun science fair project exploring magnetic propulsion.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

Tin can phones offer something modern versions don't—a fun project to make with a friend, and a dramatic illustration of vibration and sound waves.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

Which sunscreen is most effective at blocking the sun's harmful UV rays? Test the SPF of various sunblock brands in this cool science project!

Air resistance is a crucial factor when designing a parachute. In this science fair project, students find what type of material works best as a parachute.

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

Determine if picking up fallen food in 5 seconds or less prevents the transfer of bacteria from the ground.

Here is a kindergarten activity that blends art and science by using magnets, paint, and objects found around the house to create a picture.

Show your preschooler how to make a print of a butterfly using her hand as a tool--a great way to stimulate her sense of touch.

This project examines the amount of saltwater required to affect the growth of plants and subsequent effects on growth and development.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

This project explores the effectiveness of various common household ingredients in cleaning tarnished and oxidized coins.

In this science fair project, young children discover what happens when two fluids that have different densities get together.