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Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

Learn the basic structure of a DNA strand, which is the double helix, how genes form together, and the resemblance DNA has to a twisted ladder. Create a model.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

Your fifth grade aspiring poet will be delighted to learn how to write limericks, funny poems that correspond to a simple rhyming structure.

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.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

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.

Looking for way to help Japan? Start by making paper cranes! Learn how you and your child can show your support for Japan through the art of origami.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

A pangram is a sentence that uses all the letters in the English alphabet. In this group game kids might just learn a thing or two about word choice in writing!

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.

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

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.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

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.

Help your 4th grader learn how to make a topographic map and strengthen key grade level social studies and math skills in the process.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

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.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

Children will learn about food waste and conservation, create a poster that lets others know about the importance of food conservation, and make a plan to waste less food and consume with mindfulness.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

Your fourth grader will hone his fine motor skills and learn to follow directions as he creates this recycled angel tree topper out of an ordinary soda bottle!

This Kool-Aid tie-dye activity is a kid-friendly craft that never gets old. Learn how to make tie-dye shirts using assorted Kool-Aid flavors here.

Leadership is a word that can hold many meanings. In this activity, your child will define the word "leadership," learn more about a leader they admire, and reflect on their leadership. Finally, your child will reflect on how they too are a leader!

Demonstrate how to tell the age of an egg without having to crack it open.

Cultivating resilience is one of the most important ways we can overcome challenges and reach our goals. In this activity, children will explore the concept of resilience and then create a video to explain and teach resilience to others.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.