With these Physical Science & Engineering Projects, you’ll be able to discover laws of force and motion, build and construct models and machines, and more! Experience the force of magnetism, the thrust of pressurized gas, or the power of the sun in hands-on activities like building a balloon rocket car.

Check out our Force & Motion page for more hands-on project ideas with the Physics Workshop or Amazing Bridges kits, fascinating books, and more!

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Earth & Space Projects

How To Make a Mini Hot Air Balloon + Air Density

Learn about air density as you make a simple hot air balloon in this easy science project. In its simplest construction, a hot air balloon is comprised of an envelope (the balloon part), a basket, and a fuel source. We'll show you how to construct an envelope from a super-lightweight trash can liner and fuel your balloon with birthday candles.

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Physics & Engineering Projects

Egg in a Bottle + Video

Learn about the relation of temperature and pressure as you watch an egg get sucked into a bottle.

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Physics & Engineering Projects

Balloon Rocket Car + Video

Make a balloon rocket car and watch a video showing the project in action.

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Physics & Engineering Projects

Build a Simple Motor + Video

Learn about electromagnetism as you build a simple DC motor.

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Earth & Space Projects

How To Build a Solar Oven

Use solar power to cook food with a simple homemade pizza box solar oven science project.

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Chemistry Projects

Electroplating: Copper-Plated Key

Watch us use electricity to copper-plate a brass key in this project plus video.

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