Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

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

Science fair project determines relationship between number and variety of insects and spiders by collecting and counting invertebrates in a ecosystem.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

This science fair project idea explores substances that cause a bubble to last longer.

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

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

In this CD hovercraft science project, students will construct their own DIY hovercraft.

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

This basketball project explores the best way to make the perfect shot every time.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

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

This science fair project investigates why the number of visible stars changes from place to place.

Find out whether matte or shiny nail polish lasts longer.

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

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.

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

Find out which kind of bubble wrap fares best when put in impact.