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Globe at Night
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In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

Snake Kite
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In this activity, learners will explore the physics of air by making a snake kite.

Periscope
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In this activity, learners construct a device that allows them to look over ledges or around corners.

Wonderful Weather
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In this activity, learners conduct three experiments to examine temperature, the different stages of the water cycle, and how convection creates wind.

Energetic Water
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In this activity, learners explore how hot and cold water move. Learners observe that temperature and density affect how liquids rise and fall.

Metallophone
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In this activity, learners explore sound by constructing an instrument using some metal pipes, rubber bands, and a baseboard.

Katta Villayatu
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In this activity, learners play a game from India similar to Tic-Tac-Toe. Players take turns placing coins on the game board and sliding the coins along the spaces.

Expanding Balloon Universe
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In this activity, learners will discover how our universe is continuously expanding.
Stack-o-Pennies Shop
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In this math activity, learners pretend there is a special store that lets you pay for toys by their height in pennies.

Puff Mobile
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In this engineering activity, challenge learners to design a car using only 3 straws, 4 Lifesavers™, 1 piece of paper, 2 paper clips, tape, and scissors.

Program a Friend
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In this activity (on page 2), one person "programs" the other like a robot to move through a space, trying to get them to avoid obstacles and reach a goal.

How Many Pennies?
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In this math activity, learners pretend there is a special store that lets you pay for toys by their weight in pennies.

Go with the Flow
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In this quick and easy activity and/or demonstration, learners use two empty soda cans to illustrate Bernoulli's principle.

¡Terrario!
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En esta actividad, los aprendices harán un terrario usando materiales simples.

Make a Friend from Soil and Seeds
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Learners assemble a figure from a nylon stocking or sock stuffed with soil and seeds. The ends of the nylons inside the jar absorb water, which feeds the grass seeds.

Magnetic Lines of Force
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With a magnet, iron fillings, and a bottle, you can create a cool demonstration about magnetic lines of force: the fillings will arrange themselves within the magnet's magnetic field.

DIY Weather Vane
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In this activity, learners will engineer their own weather vane. This activity includes step-by-step instructions with pictures and a "What's Happening?" section explaining how the activity worked.

Color Table: Color your perception
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Look at pictures through different color filters and you'll see them in a new way. People have used color filters in beautiful photography or sending secret messages.
Many Seeds: Estimating Hidden Seeds
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In this activity, learners will estimate how many seeds are in a fruit or vegetable, then count to find out. The result: mix estimation with healthy eating.

Spinning Tops
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Create your own spinning top, and explore color, shapes and spinning. This activity contains instructions for making your spinning top, and tips on how to design and decorate it.