Figure out which fruit has the most vitamin C (ascorbic acid) in this fun science project!

Compare the whitening abilities of four different brands of whitening toothpaste to see which one whitens the fastest and which one whitens the most.

Determine which video game elevates the heart rate best and burns the most calories.

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

Ethanol can be used as an alternative fuel! The purpose of this experiment is to identify a starch plant that produces the largest quantity of ethanol.

This project examines which type of dance burns the most calories.

This science fair project determines which type of physical activity most improves memory.

Check out this cool middle school science fair project idea to find the difference between organically grown and commercial brands of foods.

Invite your kindergarten scientist to conduct this color mixing experiment to discover which primary hues make a rainbow of secondary colors.

Help your little one figure out the differences between the worlds of air, land and water, a huge step in understanding how our environment works.

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

In almost every preschool classroom is a sensory table. Learn how to make one at home!

Which do you prefer: real or artificial? Try this sweet little taste experiment to help your kids develop a better awareness of the food they consume.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

The objective of this science fair project idea is to explore which brands of "anti-fade" shampoos work the best to keep hair color looking fresh.

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

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.

The next time you and your fifth grader go on a hike, take along this key to figure out which common North American animal left a track along the river bank.

In the mood for a bit of silly science? Help your child create a truly one-of-a-kind planter out of a potato head!

Set up a fun guessing game for your curious kindergartener, one that will test her ability to use all five of her senses.

Take a nature walk in your backyard or local park to find one object for every letter of the alphabet. Then put them together in this handy nature book.

Recycling may be a confusing concept for your little one, so take the time to teach them the magic of compost - right in your own backyard!

This project examines who can jump higher, boys or girls, younger people or older, and how these two factors, gender and age, interact with one another.

Kids conduct a simple birdseed experiment to figure out what kinds of birds live nearby in this fun science activity.

Water, along with soil and light, is a necessary component for plant growth. So what's better for promoting plant growth: tap water, or rain water?

Can you wink? Is your ability to wink genetic or simply based on chance? Find out in this science fair project idea!

Make sourdough bread...and learn some colonial history and modern science in the process!

This project determines how much the rebound rates of tennis balls change after ten games.

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

This project explores the interaction between air pressure and playing surface in determining a basketballâs bounce.