An introduction to the cuica (pronounced KWEE-kah), a small friction drum used in Brazil's Carnival parade.
Make your own simple speaker from wire, magnets, and a cup.
What can you do with a frozen water balloon? Plenty!
Build a simple motorized toy made of a recycled CD and a DC motor.
Make a crowd-pleasing noisemaker called a sound sandwich, which you can adjust to raise or lower its pitch.
Build a stripped-down motor, a simple, easy-to-make version of the electric motors found in toys, tools, and appliances.
Staff member Vivian Altmann presents the "Snack" Water-Bottle Membranophone." Make some noise with simple materials.
Make a spinning disc called a stroboscope, which lets you create your own animated cartoon.
Stand outside on a sunny day with a watch in your hand, and you can tell which way is north.
See for yourself how the tilt of the earth's axis results in what we experience as the seasons.
Try your hand at explaining symbols both modern and ancient, and then make your own.
Why is your shadow longer in winter than in summer? Grab a basketball and some paperclips and find out!
Did you know the Maya used two calendars? How did they know when to plan their big New Year's parties?
Learn to count like the Maya by studying one of their ancient stone documents.
A brief history of Chichen Itza.
The Maya were expert sky-watchers, careful observers of the motions of the celestial bodies...
