In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

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

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

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.

This science fair project idea compares biodiversity between drops of water.

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

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

In this science fair project, students use the streak test to tell minerals apart from each other.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

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.

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

This season is a great time to explore the many shapes, sizes, and species of evergreen trees. Download our "field guide" activity and learn more!

Discover flight initiation distance as you play around in the park with this fun bird watching project!

This science fair project idea explores how length affects the weight a bridge can hold.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

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.

Explore aromas with your child and help boost her brain power with some fun and interactive science activities.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Looking for an enjoyable evening activity you can do with your kids? Study the stars: help them learn about constellations by making one of their own.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

This science fair project idea examines the reason boats are shaped and engineered.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

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.