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

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

This science fair project idea provides evidence that air is everywhere and takes up space.

Do you think heat can affect a plant's growth rate?

This fun marbled paper craft uses things you're likely to have around your house, and it teaches kids some simple chemistry too!

In this design challenge, your child will make a bottle rocket using typical household items.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

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

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

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

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Combine the science of physics with the fun of playing spy. Your young detective can make his own tiny looking glass. It's simple to make!

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

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

Wondering how we know that air is there? Here's a quick and easy experiment that proves that air may be thin, but it's not too wimpy to block your shot!

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

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

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

In this activity, students will think about the form and function of household objects as they compare and contrast kitchen serving spoons of various sizes and designs.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Your second grader will love this simple soda bottle race car activity. Make a ramp and customize your car for an entertaining way to learn scientific concepts.

Get your sense of humor ready for this fun science experiment that demonstrates the fundamental physics of air pressure.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

Your kid will delight in creating an extraterrestrial vehicle from goods found around the house. There's no telling where her imagination will go!

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