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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.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

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

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

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

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

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

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

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.

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

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!

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.

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.

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

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

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

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.

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!

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

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

Unlike other seed sprouting projects, this one allows kids to compare five different sprouts (either 5 herbs or 5 flowers) by watching them grow in a glove.

Celebrate autumn with a seasonal bash. Welcome the fall with a festive party for your little one and her friends, full of crafts, snacks and fun games.

Let your fabulous crafter use their favorite flowers, fruits and herbs to whip up a delicious perfume that they can proudly present to a friend or a loved one.

This science fair project idea identifies trees using a dichotomous key.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.