Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Get your sense of humor ready for this fun science experiment that demonstrates the fundamental physics of air pressure.

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

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

Encourage a group of third graders to play this fun game of Whistle Hide-and-Seek as a warm-up to get them prepared for finding a "lost" camper.

Crystals are a very special structure. In this third grade activity, your child will learn how to grow salt crystals.

Nature is the greatest teacher, and you can help facilitate the lesson! Here's how to create a supply backpack to get your kid ready for science action!

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

Learn about different fern fronds with your third grader as you create lacy, natural decorations on your Easter eggs this year.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

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

Your third grader will be amazed at the explosive combination of vinegar and baking soda in these chocolate volcano cupcakes with white chocolate "lava."

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

This craft is a great way to explore the fascinating world of spiders and their webs as you collect spider webs from around your house with your third grader.

Invite your third grader to do taste test science to observe how a strawberry tastes when it is paired with various condiments. The results may be surprising!

Bring a little science to your third grader's Christmas as you test out his sense of smell by exposing him to common Christmas scents found in your kitchen.

Help your curious third grader construct a dazzling spinning wheel that will teach him about the science behind colors while providing some silly entertainment!

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

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

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

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

Make a spring collage with your child to get them outside and those creative juices flowing!

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Engineers in training can get started with this simple wheel-and-axle construction activity.

This first grade science activity brings the green grass of early spring inside while teaching your child about the cycles of growth.

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.