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Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

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

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Make a planter full of delicious seasonings and classic grilling vegetables, great for a Fatherâs Day gift or a fun start-of-summer outdoor activity.

Along with being an interesting science activity, dehydrated strawberries are also tasty â and healthy!

In this fun experiment, we'll find out how color affects heat absorption!

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

Construct batteries that make electricity from fruits with this fun science fair project.

Help your fifth grader trace your family's roots and interview all the living mothers to create a makeshift, 3-D family tree!

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

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

Incorporate some math and science thinking into your annual fall fun with this pumpkin investigation activity! Your child will have a blast investigating various ways of measuring pumpkins, making estimates, taking measurements, and recording their findin

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

Take a dive into the candy jar with this yummy science experiment.

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

Want to help make studying the nervous system a little more fun? This thinking cap is a great way to learn external human brain anatomy.

Check out this cool science fair project on identifying rocks and minerals for kids.

Will the shape of an ice cube impact how fast the ice melts?

Teach kids about a fun way they can remember this more efficiently- the power of mnemonics. Kids will be amazed.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

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.