Projects, Lessons, Activities (Page 5)

Explore Optical Illusions: Build an Infinity Mirror

Science Fair Project Idea

Scientific Method

Do you want to trick friends and visitors with an amazing optical illusion? In this engineering design project you will learn how to build an infinity mirror,with built-in lights that make the mirror look like a deep tunnel with no end. But pick the mirror up and look behind it, and you will see that it is only a couple of inches thick! Read this project to find out not only how this illusion works, but how to design and build your very own infinity mirror from scratch. Read more

Make a Lemon Volcano

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1150 reviews

Make a colorful erupting volcano in your kitchen with lemons and baking soda! Read more

Chemistry of Ice-Cream Making: Lowering the Freezing Point of Water

Science Fair Project Idea

Scientific Method

Have you ever made your own ice cream? If you have, you probably know that you need to get the ice cream mixture really cold to freeze it quickly. Ice cubes alone will not do the job, but if you add chemicals, such as salt or sugar, to the ice cubes that surround the ice cream container, the mixture gets cold enough to freeze. Why does that work? How does adding salt or sugar affect the freezing point of water? Find out with this ice-cold science project and use your results to make your own… Read more

Make String from Algae

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Did you know that the seaweed you've seen in the ocean or even eaten as a snack is inspiring innovators to imagine new materials? Large brown algae, like kelp, contains polymers—long chains of molecules—that are more environmentally friendly than the ones in most plastics. These natural polymers (alginates) could eventually be used to create sustainable everyday objects. Try your hand at using a bit of chemistry to turn biodegradable polymers from algae into your own custom… Read more

Build a Mini Trebuchet

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You probably know what a catapult is. In the Middle Ages armies would use them to hurl stones at castle walls. But did you know about an even bigger type of medieval siege weapon called a trebuchet? Try this project to build a miniature version! Read more

Make a Fire Snake

STEM Activity

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With a few simple ingredients, you can create a "fire snake" that appears to grow out of nowhere in this fun experiment! Although it looks magical, no magic is involved—it is all because of a chemical reaction. Try it to find out how it works! Read more

Build a Solar-Powered Car

Science Fair Project Idea

Scientific Method

Do you want to build a solar-powered car? How about enter it in a competition and race it against other people's designs? If so, this is the project for you! These instructions will show you how to get started building a solar-powered car that you can enter in a science or engineering fair. No experience needed. If you want, you can even compete in the Junior Solar Sprint, a regional competition for solar-powered cars. Get more information about your regional competition. Are you a… Read more

Shrink a Potato with Osmosis!

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Have you ever wondered how plants take up water from the soil? Water uptake in plants is quite complex and involves a process called osmosis. Osmosis makes the water from the soil move into the roots of the plant. But what drives the water from the soil into the plant cells? In this activity, you will do an experiment with potatoes to find out! Read more

The Strength of an Electromagnet

Science Fair Project Idea

Scientific Method

You may be familiar with permanent magnets—the kind that hang on a refrigerator. But did you know that other magnets, called electromagnets, can be turned on and off? When turned on, electromagnets act just like permanent magnets, but if you turn them off, their magnetic properties disappear. Electromagnets are an important part of many electronic devices, like motors, loudspeakers, and hard drives. You can create an electromagnet with a simple coil of wire and a battery. In this project,… Read more

Build a Simple Walking Robot

Science Fair Project Idea

Engineering Design Process

Humans are pretty good at building vehicles with wheels, but building machines with legs that walk like us is a lot harder! In this engineering project you will build a simple robot that walks using a single motor. How fast can you make your robot go? Read more

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