What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

This science fair project idea investigates the difference in reaction times between boys and girls.

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

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

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

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.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

Discover how and which salt melts ice the quickest.

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

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

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

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

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

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

Plants need water to grow. In this project we learn how plants transport water from their roots to their leaves

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

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.

Examine the effect of pressure on carbonation in soda.

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

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

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

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

This science fair project idea explores how length affects the weight a bridge can hold.

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