Help your little builder move up in the world with this recycled cardboard castle that's just the right size for a young king and his loyal stuffed subjects.

This science fair project idea investigates whether air has mass and weight.

This beaded wind chime is fun to make and it gets kids experimenting with patterns, a key kindergarten math skill.

Challenge your kindergartener to finding out if a coin toss is really fair by conducting this coin toss experiment.

In this science fair project, young children notice and track changes in trees throughout the year.

Counting with one-to-one correspondence is an important kindergarten math skill. This simple activity turns it into a play-anywhere game.

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

This guessing game is a hoot. And it helps teach kids to categorize a set of objects-- a key skill for preschool.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

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

This science fair project introduces children to static electricity and the idea that electricity is more than lights and plugs.

In this science fair project, young children observe, record, and create collections of shapes in their world and increase their powers of observation.

Can you fool your eyes and your brain with an optical illusion? The purpose of this science fair project is to demonstrate various kinds of optical illusions.

This slightly tweaked version of "Hide and Go Seek" hones listening: a key skill for kindergarten.

This fun and easy activity encourages the skill of overlapping objects, while your child gets to draw his own farm and color in clip art farm animals!

Help your child reinforce the order of the alphabet with this hands-on activity using some everyday materials. It's a fun way to put a spin on a timeless skill.

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

This copying game is like a hopped up version of Simon Says, but it lets kids use their bodies to practice patterning, a key skill in early math.

In this awesome science fair project idea, kids will be attempting to pick up different objects using snail slime.

Help your child stay physically and mentally active with this group aerobic fitness game that's good for the heart and mind alike.

In this science fair project, we'll explore how blocking the sun's light can stop those can stop photosensitive paper from changing color.

Dinosaurs were huge creatures that left behind huge footprints that lasted for millions of years. In this science fair project, kids learn how dinosaur tracks were left behind!

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.

In this science fair project, young children will become aware of and have the opportunity to experience the four basic tastes: sweet, sour, salty, and bitter.

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 alphabet hunt is pure pirate-loving fun. And it gives kids practice in learning to recognize letters and sounds-- a key skill for reading readiness.

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.

For a cool art project, help your child create a "Me Timeline," a unique poster that works on a key math and social studies skill: putting events in order.

Help your kindergartener develop his sequencing skills in this activity that teaches him about a story's beginning, middle, and end.

This engaging project encourages young children to practice and refine the important scientific skills of sorting and classification.