This science fair project idea determines if the color of light affects the growth of plants.

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

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

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

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.

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

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

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

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

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

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

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

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.

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.

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

This science fair project idea investigates whether plants can survive being frozen.

This science fair project idea explores the different properties & interactions of sugar molecules.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

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

How powerful is the reaction between baking soda and vinegar? Find out here!

This science fair project examines how seeds hitchhike on animals and clothing.

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

Popsicles aren't just for the summertime, this activity takes cold and turns it into a creative and tasty science experiment.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

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

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

Could there be toxic chemicals lurking in the cupboards and closets of your home?