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

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

This science fair project idea investigates if fats add to the flavor of food.

This science fair project idea examines which type of insulation holds in the most heat.

In this design thinking activity, your child will choose an animal to research, learn about the animal’s habitat, and then replicate the animal's habitat using household items.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

In this design challenge, your child will create a parachute for a small toy using typical household items.

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

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

Construct and experiment with a periscope using reflected light rays to gather an image.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

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

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 science fair project, students make their own rain gauge to measure rainfall.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

In this science fair project, students will try to discover if test subjects can detect the presence of Monosodium Glutumate (MSG) in food.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

Discover whether cold or hot water from the faucet will boil faster on the stove.

This science project teaches students to classify different shapes of leaves.

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

This project examines whether people's taste perception is influenced by what they see.

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

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

This science fair project idea investigates how color affects temperature.

This science fair project idea discovers which brand of bubblegum produces the largest bubbles.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.