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In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

Check out this fun and easy science fair project idea on germination of a seed and learn to identify exterior and interior parts of a bean seed.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

Here is a quick experiment you can conduct at the playground to introduce or reinforce the concept of Newton's First Law, The Law of Inertia.

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

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!

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

Conduct a simple science experiment to see if flowers from your garden pass the acid-base indicator test with this exciting chemistry activity.

In this activity, students will create a stop motion animation by creating a clay figure and taking a series of digital photographs.

How to test for acids and bases? In this activity you and your child can make your own indicator from red cabbage!

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

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

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.