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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.

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 project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

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

Find out whether putting something on top of a plant will inhibit its growth.

Make a planter full of delicious seasonings and classic grilling vegetables, great for a Fatherâs Day gift or a fun start-of-summer outdoor activity.

This project examines whether playing music during class helps students learn or if it distracts students from learning.

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

Discover how and which salt melts ice the quickest.

An hour glass, also known as a sand clock, keeps time. In this activity, your child will make her own sand clock and measure the time it keeps.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

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