How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

This science fair project idea examines liquids of different densities.

In this project, vinegar and salt act as preservatives keeping bacteria from growing in the bouillon mixtures.

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

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

The project determines which laundry detergent is best for cleaning clothes.

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

Construct and experiment with a periscope using reflected light rays to gather an image.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

In this project, a model of a submarine is built to simulate the buoyancy and displacement of water and air.

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

This science fair project idea researches the effects of acid rain on plant growth.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

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

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

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

Turn an abstract lesson into a practical craft with the fun and colorful creation of dough earth layers!

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

Compare animal and plant fats and observe, and record, and draw conclusions about their similarities and differences.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

This science fair project idea researches how your choice of clothing affect how hot or cool you feel during the day.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

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!

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.