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 activity challenges students to use computational thinking as they create a sequence of commands that will make a robot navigate around several obstacles.

This fun marbled paper craft uses things you're likely to have around your house, and it teaches kids some simple chemistry too!

Help your child get to know the least-appreciated of the five senses, the sense of smell, with a smelling station.

In this activity, your student will be invited to build a chair out of building blocks that is designed to meet the specific size and shape of a small doll or toy figure.

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

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

In this activity, your child will learn about a style of gardening that uses moss, also called "kokedama."

This activity works well with a group or just with a parent and child, and it can make a great party game since it's both fun and inexpensive.

Create a mini plant habitat with your kid to help teach him what it takes to make an ecosystem work.

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

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

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

Teach your child to dye eggs with natural ingredients from the grocery store. From pink to gold, these eggs are perfect for hiding, hunting or simply munching.

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.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

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

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

Plants and light seem to be good buddies, but how far does the friendship really go?

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

In this design challenge, your child will make a bottle rocket using typical household items.

Test your friends to find out if you can replicate the placebo effect's incredible results.