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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.

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.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

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

Who knew that you could make beads out of rose petals? Not only can it be done, but the beads smell wonderful!

Do plants breathe? Not exactly. They do respire though! This activity will help your child with see that plants are producing the oxygen we need to survive.

Make a backbone model to explore human anatomy and life science.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

In this activity, your child will be challenged to make a tower using paper cups.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

Have your child kick off their summer vacation by making a miniature water slide!

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Teach your child how butter is created by shaking up cream the old-fashioned way.

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

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

Determine whether butterflies like to drink sugar water, salt water, or plain water.

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

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

In this activity, students will create a stop motion animation by creating a clay figure and taking a series of digital photographs.

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

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

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.