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Construct batteries that make electricity from fruits with this fun science fair project.

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.

Wind is an important source of renewable, green energy. The purpose of this science fair project is to build and operate a windmill generator.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

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.

Along with being an interesting science activity, dehydrated strawberries are also tasty â and healthy!

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.

Have your child kick off their summer vacation by making a miniature water slide!

In this activity your child will create their very own marble maze!

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.

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

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

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

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

In this design challenge, your child will make a bottle rocket using typical household items.

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

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

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

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

In this cool catalase and hydrogen peroxide experiment, kids put a potato in a jar of hydrogen peroxide to see how catalase acts as an enzyme.

In this fun activity, your child will create their very own solar oven to bake s'mores!

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

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!

This science fair project idea examines the reason boats are shaped and engineered.