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Total alkalinity and pH personal care products are controlled to prevent skin irritation. Learn more about basic and acidic substances in this science project.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

This activity works well with a group or just with a parent and child, and it can make a great party game since it's both fun and inexpensive.

Many ancient cultures used the rising or setting sun to create calendars. Observe the setting sun once a week to come up with your own solar calendar!

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.

Help your child understand surface tension by showing them how they can create a "skin" on top of water.

Help your child create a magical miniature garden in the most unlikely of places: a recycled plastic bottle!

How powerful is the reaction between baking soda and vinegar? Find out here!

Perk up your front porch with this hanging vase craft, perfect for spring and for getting kids outdoors!

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

Slip some science into storm watching with a homemade rain gauge!

Celebrate April Fools' Day with a science prank that is sure to amuse...and educate too!

Your kid will delight in creating an extraterrestrial vehicle from goods found around the house. There's no telling where her imagination will go!

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

This weather spinner will improve observation skills by encouraging children to examine and track weather details and patterns.

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

Create a bee garden to help shelter bees in your area.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

This science fair project investigates why the number of visible stars changes from place to place.

Create a mini plant habitat with your kid to help teach him what it takes to make an ecosystem work.

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

This activity challenges your student to use spatial reasoning and computational thinking to program multiple robots.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!