In this science project, baking powder and vinegar are used to simulate the action of a fire extinguisher.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

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!

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

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

Here's a fun and simple activity to introduce your child to surface tension, and pull an awesome stunt in the process!

Give your budding young observers a chance to discover simple machines at use in their own home.

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

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

Teach your fifth grader about the wonders of wind by making and observing this winter wind chime.

By using static electricity generated from their body, a child can cause a small fluorescent lamp bulb to light up!

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.

Help your fifth grader embrace the roots--literally--of Mother's Day by growing carnations to honor mothers in you family's history.

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

This science fair project idea investigates the difference in reaction times between boys and girls.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

In this activity, your child will make her own "quicksand" to better understand how a substance can be both fluid and solid at the same time.

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

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

In this design challenge, your child will create a parachute for a small toy using typical household items.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.