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

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

Introduce your child to the amazing, almost magical phenomenon of static electricity!

Will increasing the amount of salt in water effect how slow or fast the water freezes?

In this activity, children will let their imagination run wild as they design and build a new planet in the solar system.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

Help your child create a tasty treat that will demonstrate exactly how frogs survive a freezing season.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

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

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

Cleaning can be a chore, but not with this sudsy experiment!

In this simple circular motion experiment, you'll observe tangential velocity and learn about how acceleration and centripetal force affect an object.

Learn all about balance and motion as your child designs a corn maze!

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

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

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

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

If your science savy third grader is up for a challenge, let her bend light with a casserole dish!

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

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.