In this activity, your student will be invited to build a chair out of building blocks that is designed to meet the specific size and shape of a small doll or toy figure.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

This classic children's game demonstrates how sound travels through air vs. through a solid.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

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

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

In this experiment you will replicate the mummification process by making a hot dog mummy.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

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.

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

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

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.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

In this project children practice the scientific method while playing with puffy paint.

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

This science fair project idea explores how length affects the weight a bridge can hold.

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

This project determines what category of person is most likely to be ticklish.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

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

This science fair project examines how seeds hitchhike on animals and clothing.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!