In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

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

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Discover whether a metal will expand under hot water.

Incorporate some math and science thinking into your annual fall fun with this pumpkin investigation activity! Your child will have a blast investigating various ways of measuring pumpkins, making estimates, taking measurements, and recording their findin

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

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

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

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

This easy aerodynamics activity is a simple way to introduce kids to the scientific method.

This biodiversity project examines the biodiversity in your own backyard.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

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

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

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

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

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

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

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

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

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

Combine the science of physics with the fun of playing spy. Your young detective can make his own tiny looking glass. It's simple to make!

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