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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.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot navigate around several obstacles.

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

Using scherenschnitte, your science-savvy second grader will be able to create and display each part of a vegetable!

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

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

Delight your budding scientist with this cool physics magic trick and teach her some basic physics concepts while you're at it!

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

Learn all about balance and motion as your child designs a corn maze!

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

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

Teach your child to dye eggs with natural ingredients from the grocery store. From pink to gold, these eggs are perfect for hiding, hunting or simply munching.

By incorporating natural materials and the powers of observation, your child will become a backyard naturalist while building early writing and drawing skills!

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

In this activity your child will create their very own marble maze!

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!