Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Do you think heat can affect a plant's growth rate?

Start your toy engines -- this is going to be a fast and friction-filled race!

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

This science fair project idea experiments with spinning color wheels and optical illusions.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

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.

People have favorite flavors, but what about ants? Which ant food is the most popular?

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

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!

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 science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

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

This science fair project idea determines the most effective method of preserving food.

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 science fair project teaches students about wilting and browning of salad greens.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.