Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

This science fair project idea produces varying pitches of sound.

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

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

In this science fair project, students use the streak test to tell minerals apart from each other.

Glass is see-through, but usually you can still see that it is there. In this experiment, we use baby oil to make glass go completely invisible.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

Help your child plant a "tea garden": a garden made of herbs for making teas.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

Kids will discover the meat science behind the meat they eat, and find out how to use safe chemistry to make meat more tender.

Help your child create a working lung model that fills with air just like the lungs inside of his own chest when he breathes.

Try this chemistry experiment with your curious kid and get some "shocking" results!

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

In this science fair project, students make their own rain gauge to measure rainfall.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Turn an abstract lesson into a practical craft with the fun and colorful creation of dough earth layers!

This taste buds science experiment demonstrates how strongly our sense of smell controls what we taste.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

Which do you prefer: real or artificial? Try this sweet little taste experiment to help your kids develop a better awareness of the food they consume.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

Every time a sound is produced it emits a sound wave. This experiment demonstrates how sound travels, using nothing more than a spoon and a string!

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

Make sourdough bread...and learn some colonial history and modern science in the process!

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.