Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

This fun marbled paper craft uses things you're likely to have around your house, and it teaches kids some simple chemistry too!

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

This project compares the strength of one, two, and three-ply toilet paper.

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

Find out whether a longer airplane will fly farther or a wider paper airplane.

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

In this activity, your child will be challenged to make a tower using paper cups.

Introduce your second grader to the crazy world of static electricity with just a balloon and a sheet of paper.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Your child will create her own falling snowflakes using white paper and glue them over a tree, so it appears as if they are falling from the sky.

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.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

Create a three-dimensional X-ray of your child's hand in this simple modeling activity. All you need to get started are black paper and drinking straws

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Using a toy race car kids create a visual model of the Doppler Effect.

In this project children practice the scientific method while playing with puffy paint.

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.