This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

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.

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

Use pepper and soap to discover some fun facts about the properties of water.

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

Learn about this simple machine and make a pulley of your own to use for fun science trials.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!

Start your toy engines -- this is going to be a fast and friction-filled race!

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

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

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

Test your friends to find out if you can replicate the placebo effect's incredible results.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.