Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

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

Teach your child about recycling and gardening as she re-uses an empty plastic milk gallon jug to craft a swan-shaped plant container!

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

Kids will explore the corrosiveness of soda in this cool science fair project by leaving pennies submerged in soda overnight.

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

This science fair idea is a great way for kids to explore static electricity. Kids will give a comb a static charge and watch as it separates pepper from salt.

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

Here's a fun activity to help build thinking skills in young first grade scientists, and to encourage them to have a blast exploring the mass and volume.

This science fair project teaches students about wilting and browning of salad greens.

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

Study science with your first grader in this arts and crafts activity that models the reason why fall leaves change color with some paint and crayons.

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

This fall, make a leaf crown that will encourage creative play and your child's interest in the natural world while you help them build fine motor skills.

Take a closer look at the soil that surrounds us, and give your child a lesson in Geology 101!

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

Put those fall leaves to use with this fun art activity. Kids paint and print leaves, to make a beautiful tablecloth, perfect for your next fall celebration.

Encourage your kindergartener to investigate and chronicle the weather she observes during the coldest months of the year.

Introduce your child to science with something they see everyday--their shadow!

Help kids tap into their inner inventor by teaching them how to make peanut butter through trial, error, and lots of taste testing!

It's easier than you think to make homemade play dough -- just a few pantry staples makes a natural version of the toy that kids have loved for generations.

Planning a beach vacation? Here's a cool nature craft you can make in the sand with your child.

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

The objective of this science project is to determine the length of time for different seeds to germinate.

Your child grows a green thumb and flowers with this seed planting activity that also celebrates the 100th day of school!