Explore solids and liquids with your young scientist by making gluep, a goopy substance that can behave like both a solid and a liquid!

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

Water can go from solid to liquid to gas...but how does popcorn go from kernel to snack? Invite your first grade scientist to find out.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

Teach your first grade scientist the difference between liquids and solids using maple syrup.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

Your kid will be captivated as she watches liquids change color before her very eyes during this fun science project that introduces some chemistry basics.

First grade science often covers solids, liquids, and gases. This silly science explores serious facts about the difference between all three.

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

Find out whether we can create motion in a dish and as a result, create a wonderful and colorful show.

This science fair project idea determines which method of hand cleansing is the most effective.

In this project children practice the scientific method while playing with puffy paint.

Satisfy your sweet tooth with this easy summer activity! Make homemade ice cream and let your child practice his science skills.

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

What is surface tension? Kids will discover how water-skating insects use surface tension to keep from sinking by making a model water walker.

Study science with your first grader in this arts and crafts activity that models the reason why fall leaves change color with some paint and crayons.

It's easier than you think to make homemade play dough -- just a few pantry staples makes a natural version of the toy that kids have loved for generations.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Give your local birds a treat — and your young birdwatcher some fun — with this simple DIY bird feeder.

Planning a beach vacation? Here's a cool nature craft you can make in the sand with your child.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.