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 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

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

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

Reinforce your child’s understanding of the alphabet by helping them construct all of the letters using pipe cleaners.

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.

Here's a fun at-home activity that will help your child strengthen math skills using high and low temperature data, and become a master temperature tracker!

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

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

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

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.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

This science fair project idea produces sounds by creating vibrations using different objects.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

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.

Many ancient cultures used the rising or setting sun to create calendars. Observe the setting sun once a week to come up with your own solar calendar!

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

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

Amaze your kids by separating a salt and pepper mixture using an "electric spoon" charged with wool.

Here is a nifty science experiment using Epsom salts to make "frost" appear on a piece of glass.

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

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

Using simple materials found around your home, you can reinforce the static electricity concept by helping your child build a simple device with zapping power!

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.