This science experiment tests whether warm or cold water works best in making cut flowers last longer.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Create a three-dimensional X-ray of your child's hand in this simple modeling activity. All you need to get started are black paper and drinking straws

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.

Bring the fun of gardening indoors! By stuffing a simple pair of pantyhose with a few grass seeds on top, your child can grow her very own plant pet.

This project can help prepare your child for a trip to the tide pools, or give him a way to remember some of the many creatures he saw during his visit.

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

This balloon-powered car project is a great way for your kid to learn about energy and how it can be used efficiently.

Combine your child's natural curiosity with his developing classification and writing skills by helping him create a backyard field guide.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

This science fair project teaches students about wilting and browning of salad greens.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Make a wish upon a tree with this craft that also helps your child learn more about Chinese culture.

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.

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.

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

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.

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.

Create a mini plant habitat with your kid to help teach him what it takes to make an ecosystem work.

This weather spinner will improve observation skills by encouraging children to examine and track weather details and patterns.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

Using a toy race car kids create a visual model of the Doppler Effect.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

Does your child always demand to know why the sky is blue, how the sun moves across the sky, or where wind comes from?

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.

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