An hour glass, also known as a sand clock, keeps time. In this activity, your child will make her own sand clock and measure the time it keeps.

Explore the chemistry of latex polymers with this outrageous, hilarious science activity.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

This science fair project idea experiments with spinning color wheels and optical illusions.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

April showers may bring May flowers, but your child can preserve the beauty of spring's bounty all year long with this simple craft project!

Teach your child how to make an all-natural, yellow-brown dye, using just walnut shells and water. This deep dye can be used on textiles, art, and wood.

Give your budding young observers a chance to discover simple machines at use in their own home.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

This science fair project idea investigates which objects float and sink in honey, water, and oil.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

These flying potato poppers make a cool sound, create a celebratory mood, and they can teach your child about the power of air pressure.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.