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Floating Butterfly
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In this activity, learners create a cool floating animal using the science of magnetism. Learners discover what happens when a piece of magnetic metal enters a magnet's field.

Motorized Balancing Toy
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In this activity, learners build a toy that flies in circles. This activity introduces learners to center of mass, torque, and rotational motion.

Stroboscope
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In this activity (posted on March 20, 2011), learners follow the steps to construct a stroboscope, a device that exploits the persistence of vision to make moving objects appear slow or stationary.

Breathing Blue
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In this activity, learners test exhaled breath for carbon dioxide and learn how to use an indicator as a simple way to measure pH.

Airboat
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In this activity related to Newton's Laws of Motion, learners build a boat powered by a propeller in the air.

Finger Basketball
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In this activity, learners build mini-basketball courts using cardboard and measuring spoons. Use this activity to introduce learners to catapults, forces, and levers.

Hot & Cold
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In this activity, learners experiment with hydrogen peroxide, vinegar, yeast, and baking soda to produce hot and cold reactions. Use this activity to demonstrate exothermic and endothermic reactions.

Propeller-Powered Car
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In this activity, learners construct cars that are powered by hand-made, electric propellers.

Bookshelf
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In this activity, learners use simple tools to build a bookshelf with a built-in bookend.

Bag Pipe
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In this activity, learners explore sound by constructing their very own bagpipe instrument.

Magnet Tower
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In this activity, learners build magnetic towers to explore the forces and properties of magnets.

Rocking Changes
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In this earth science activity, learners conduct a series of short experiments to explore how rocks change.

Electromagnet
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In this activity, learners build an electromagnet using a nail, a cork, a battery, and electrical wire. Use this activity to demonstrate how electric currents produce magnet fields.

Squidgy Slime
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In this chemistry activity, learners transform two ingredients (4% polyvinyl alcohol solution and 4% borax solution) into gooey slime.

Weather Vane and Anemometer
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In this meteorology activity, learners construct simple devices to measure the direction and speed of wind.

Rubber Band Boat
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In this activity, learners build styrofoam boats powered by twisted rubber bands.

Minibot
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In this activity, learners build a mini dancing robot. This engineering activity introduces learners to electricity, circuits, switches, conductivity, and motors.