Use reusable, recyclable materials--along with a dose of imagination--to build a castle with first grade geometrical forms.

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

Put a twist on traditional oil painting with this fun science activity that you and your first grader can do together.

This project compares the strength of one, two, and three-ply toilet paper.

Help your fifth grader trace your family's roots and interview all the living mothers to create a makeshift, 3-D family tree!

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

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

Create a three-dimensional X-ray of your child's hand in this simple modeling activity. All you need to get started are black paper and drinking straws

Children learn the six parts of a plant...but do they really understand? Try this plant-themed meal plan to bring school science into the home.

In this open-ended activity, students will be given a small quantity of three types of materials and asked to design a prototype for “something that will improve the school.”

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

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

Help your second grade scientist explore the timely topic of wind speed using a version of the classic Beaufort Scale.

This second grade arts and crafts activity is all about caterpillars emerging from their cocoons as butterflies.

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

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

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

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

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

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.

Here's a first grade ladybug game that explores how air can move solid objects, and adds some measurement practice, too. Play, learn, and enjoy!

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

This Mother's Day, mix in some fifth grade science learning to create this fabulous fudge!

In first grade, children are introduced to fractions. Here's a recipe that combines fraction practice with winter fun and lets kids actually paint the snow!

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

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.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.