Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

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

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

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

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.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

Discover whether a metal will expand under hot water.

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

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

This project investigates the affect of storage temperature on microwave popcorn.

Throughout history, people have used song as a teaching and memory tool. This project explores whether song improves a person's ability to retain information.

Examine the effect of pressure on carbonation in soda.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

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

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

This science fair project idea explores whether white light can be separated into different colors.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

Explore if planting seeds in a certain direction will affect how fast it germinates.

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

Construct and experiment with a periscope using reflected light rays to gather an image.