Look Kool creates musical instruments using cylinders. When deconstructed, a cylinder is like a rectangular piece of material rolled up to  form a three dimensional shape. Copper water pipes of different lengths make different sounds.  The Investigators find cylinders that make sound: a pan flute (bamboo cylinders), a triangle, wind chimes, an African drum, a saxophone, and a French horn. Bach demonstrates how the length of a cylinder affects the sound, and how holes in a cylinder can vary the length. Phoenix demonstrates how cylindrical water glasses can produce different sounds. The challenge teams turn cylindrical objects into 3 percussion or wind instruments, and we learn the science behind sound in cylinders.