This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

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.

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

Learn about the effect of artificial light on plant growth versus natural sunlight and delve into some biology and botany concepts in this science project.

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

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

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.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Word color association is just a fancy way to talk about the way we connect colors with words.

This science fair project idea determines if the temperature of rubber effects how high it bounces.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

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

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

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

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

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

Check out this cool science fair project on identifying rocks and minerals for kids.

The goal of this science fair project is to demonstrate different ways to generate static electricity and record its effects.

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

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.