Download the PDF file containing the cipher wheels. Copy and cut out the two wheels. Place the smaller wheel on top of the larger wheel and rotate them so your "key letter" on the small wheel is ...

Single-serving, see-through snack cup of gelatin (the lighter the color, the better: lemon, lime, and orange flavors work well) Viscous, edible dessert or sauce, such as pudding, yogurt, or chocolate ...

If you reach up and feel around your eye, you’ll feel the bone of your skull. There’s fat surrounding your eyeball to keep it from bumping up against the bone and getting bruised. In the cow’s eye ...

Make models of the earth and moon Make a model Earth by rolling out a small ball of green or blue clay. The ball should be between ½ to ¾ inches (about 1.5 to 2 cm) in diameter (click to enlarge photo ...

Start with a story! Books can serve as inspiring launching points for OctoStudio explorations. Look for books that have interesting shapes, patterns, and characters to bring to life with code. One of ...

Turn the bottle on its side and rotate it. Watch what happens to the iron filings. They will form a three-dimensional pattern that traces out the magnetic field of the magnet. Pay particular attention ...

Using the pinhole viewer We found that the pinhole viewer works well outside on a sunny day. Look into the opening in the top of the box, squeeze the box so it fits tightly around your face, and use ...

The Sun and moon aren’t really the same size, of course: the Sun is 400 times the diameter of the moon. But it’s also 400 times farther away from us, and this relationship between size and distance ...

What should I wear? You'll want to wear comfortable clothes. We recommend layers, so that you're ready for whatever San Francisco weather comes your way—sun, fog, or a chilly ocean breeze. Comfortable ...

Make a simple mini-motor.Give the coil a spin to start it turning. If it doesn’t keep spinning on its own, check to make sure that the coil assembly is well balanced when spinning, that the enamel has ...

One of the most exciting exercises I ever did as a kid was to make a scale model of the Solar System. Most of the pictures in my books made the distance between planets seem small and easy to travel.

When you use your inclinometer to look at something above your head, the inclinometer tilts. The string crossing the protractor marks the angle of that tilt, which depends both on the height of the ...