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

Got a young scientist at home? Try this project with him!Create your own molecule design with this home-made clay recipe and some toothpicks!

Use a microscope in this experiment to learn about different kinds of "good bacteria" that turn milk into yogurt!

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Do different types of oil mix or stack? Find out in this science fair project idea!

Roasting pumpkin seeds makes for a great Halloween activity, and a healthy snack!

Observe if dissolved aspirin will help plants grow healthier and faster in this science fair project idea.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

Amaze your kids by separating a salt and pepper mixture using an "electric spoon" charged with wool.

This experiment uses a yeast solution, liquid detergent, and hydrogen peroxide to produce an exciting reaction like no other!

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

Determine whether carpet placed on a lawn will kill grass and weeds. Choose an area of lawn that you would like to remove, record grass that is dead or dying.

This science project challenges students to take learned information about weather and climate control and apply it to come up with creative ideas of their own.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

Make these homemade shell fossils and introduce your child to the wonders of science!

This science fair project explores how salt and sugar affect the melting rate of ice in water.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Take the plunge into handcrafting with this neat and tidy soap recipe. Here's how to create your own personalized soap.

Science fair project that examines condensation and the conditions needed in order for dew to form.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

Make a bear cave for your child to play and explore, learning about bears and winter hibernation.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

Make this easy composting dessert and then enjoy the yummy results!

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

This clay "painting" activity encourages and supports creative development and critical thinking skills.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

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

Make homemade lemonade in a baggie with your preschooler with this fun and easy recipe.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.