Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

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

How well can people recall what they have observed. Test your knowledge in this fun experiment.

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

How do organic materials become soil? This science experiment measures what materials biodegrade.

Explore scientific concepts with this experiment that introduces kids to the scientific method!

This science fair project idea determines if the color of light affects the growth of plants.

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

This science fair project idea investigates whether plants can survive being frozen.

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.

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

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Before Twitter, birds were the ones tweeting, not humans. Have your child discover the magical sounds of nature while recording birds around his neighborhood!

This science experiment tests if dog saliva can really help heal wounds.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

What combination of cloth and stain will be the easiest for removing stains? Test and experiment!

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

Find out whether putting something on top of a plant will inhibit its growth.

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.

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

Plants and light seem to be good buddies, but how far does the friendship really go?

Test whether plants can grow without sunlight and water.

The project investigates the affect music has on plant growth while experimenting with rock, classical and no music.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.