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How do organic materials become soil? This science experiment measures what materials biodegrade.

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

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

This science fair project teaches students the differences between fruits and vegetables.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

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.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

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

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

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

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

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

This project examines whether playing music during class helps students learn or if it distracts students from learning.

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.

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.

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

This tricky building block challenge asks your learner to think creatively. They will work on their divergent thinking skills as they try to fill up an index card perfectly with building bricks.

This science fair project idea identifies trees using a dichotomous key.

This science fair project will help students learn about non-vascular plants, such as mosses.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

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

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

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.