In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

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.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

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

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

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

In this activity, children will work on their mathematics and engineering skills as they attempt to recreate the Eiffel Tower out of building blocks!

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

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.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

In this activity, your learner will be challenged to create their own tic-tac-toe grid out of building blocks.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

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

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

The project examines absorbent polymers absorbency in disposable diapers and their unique ecological problem to the environment.

Take a dive into the candy jar with this yummy science experiment.

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.