In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Give your budding young observers a chance to discover simple machines at use in their own home.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

April showers may bring May flowers, but your child can preserve the beauty of spring's bounty all year long with this simple craft project!

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

This science fair project idea experiments with spinning color wheels and optical illusions.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

Here's a fun and simple activity to introduce your child to surface tension, and pull an awesome stunt in the process!

In this science fair project you will make a model of a cell membrane using very simple material.

Learn all about balance and motion as your child designs a corn maze!

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

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Learn about lateral earthquake motion and its effect on high rise buildings in this simple 4th grade earth science experiment.

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

Would your child like to learn about a hidden world? All she needs to do is open her box of markers!

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

If your fourth grader is obsessed with all things glow-in-the-dark, then here's an activity that will really light up her imagination!

Teach your child how to make an all-natural, yellow-brown dye, using just walnut shells and water. This deep dye can be used on textiles, art, and wood.