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

In this simple and social activity, children use size comparison skills to find objects in nature that are bigger, smaller, longer, and shorter.

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

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

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!

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

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 science fair project, young children discover what happens when two fluids that have different densities get together.

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

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Teach your little scientist about the amazing powers of gravity by comparing the falling speeds of two yummy fruits

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

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

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

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

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.

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

Your 1st grade scientist will improve her observation skills as she's encouraged to eat healthy by comparing the dry and fresh fruit in this experiment.

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!

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!

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

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

Help your first grade scientist learn about metamorphosis by observing the life cycle of some interesting creepy crawlies.

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.

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

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.