How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

In this plant habitats activity, children play the role of an ecologist and take surveys of different areas to discover the best habitat for dandelions.

Your fourth grader will be astonished to discover the significance and intricacies of his spine as he builds a model of a human vertebral column.

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

This science fair project idea discovers which brand of bubblegum produces the largest bubbles.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

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

Check out this cool science fair project idea to explore which other common animals besides scorpions glow under a UV Black light.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

Check out this mind-blowing experiment in which a hard-boiled egg will fit through an impossibly small opening with the help of only a few matches!

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

Help your fifth grader trace your family's roots and interview all the living mothers to create a makeshift, 3-D family tree!

Challenge your learner to design and build a city of their own in this creative engineering activity.

This science fair project focuses on the use of the enzyme amylase found in human saliva to break down starch into sugar.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

Discover how and which salt melts ice the quickest.

What is vegetative reproduction? Find out how you can clone plants and regrow cabbage from a stem in this cool experiment!

This science fair project idea determines if the color of light affects the growth of plants.

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

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

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

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

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

This science fair project idea explores whether factors such as temperature and concentration affect the pH of a solution.

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

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Learn with makes water molecules work with this fun and easy science activity!