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

Make "fossils" with your child to hide in the sandbox or at the park or the beach, to help your child explore his archaeological side.

Lead your first grader on a nature walk ... with a scavenger hunt-style twist! They'll try to capture photos that correspond to paint chip colors.

Do plants breathe? Not exactly. They do respire though! This activity will help your child with see that plants are producing the oxygen we need to survive.

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

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

This project examines whether people's taste perception is influenced by what they see.

This project leads to an understanding that a whole may be built of smaller parts that fit and work together and provides an introduction to basic tools.

Invite your kindergarten scientist to conduct this color mixing experiment to discover which primary hues make a rainbow of secondary colors.

It's a rare kid who doesn't like a sandbox. Next time you're out digging, build in some earth science, too.

Take a nature walk in your backyard or local park to find one object for every letter of the alphabet. Then put them together in this handy nature book.

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

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

By incorporating natural materials and the powers of observation, your child will become a backyard naturalist while building early writing and drawing skills!

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

Does your child love learning about dinosaurs? Does he like digging around in search of hidden treasures? In this fun activity he'll do both!

Follow in the footsteps of movie character legends as you walk your little one through the steps of becoming a junior archaeologist.

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.

Is your little scientist up for a rocky challenge? Let them make their own geode rocks using eggs and epsom salts!

Bring the magic and mystery of the night sky to the light of day with this fun constellation art project!

If your child aspires to be the next Frank Lloyd Wright, we've got some tips on building sand castles that last.

In this fun guessing game, your child uses his sense of smell and taste to figure out what is in the container. Here's how to play:

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

In this project children practice the scientific method while playing with puffy paint.

Create your own cloud with an activity that will explain how important concepts such as evaporation, condensation, and precipitation work.

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

Kids grow sunflower greens from seeds for a hands-on gardening experience in this kindergarten life science activity.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.