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.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

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 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

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.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

This science fair project enhances the understanding and awareness of energy use and explores the concept of energy efficient.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

Make a spring collage with your child to get them outside and those creative juices flowing!

In this science fair project, students use the streak test to tell minerals apart from each other.

Roasting pumpkin seeds makes for a great Halloween activity, and a healthy snack!

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

This science fair project idea's objective is to become familiar with items your family regularly throws in the trash.

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.

Engineers in training can get started with this simple wheel-and-axle construction activity.

Slip some science into storm watching with a homemade rain gauge!

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

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Here's a pressed leaf card project that puts science and writing together for your second grader.