Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

This balloon-powered car project is a great way for your kid to learn about energy and how it can be used efficiently.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

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

Is your little scientist up for a rocky challenge? Let them make their own geode rocks using eggs and epsom salts!

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

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

In this project students experiment with making music using only glasses of water.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

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.

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

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

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

In this activity, your child will learn about a style of gardening that uses moss, also called "kokedama."

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

Think you can blow up a balloon without using your mouth? This isn't just a cool trick, it's also a great way to introduce chemistry and biology concepts.

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

Recreate the fantastic phenomena of solar eclipses with your child using just a flashlight, a quarter, and her very own face!

In this design thinking activity, your child will choose an animal to research, learn about the animal’s habitat, and then replicate the animal's habitat using household items.

Got a birdwatcher on your hands? Bring the birds to your backyard by making a zany bird feeder using an orange and some string.

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

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.

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.