901 documents the dismantling of the offices of famous U.S. designers Charles and Ray Eames following Ray’s death in 19XX. The Eames office was a kind of maker fantasy-land, with finished and unfinished projects scattered about, meticulously organized tools and supplies, and wonderful little gewgaws in every nook and cranny.
The first few minutes of the film feature a delightful bubbling xylophone soundtrack that is eventually revealed to be coming from these prototype toys designed by the Eameses themselves, and installed in their office for their own amusement.
The towers are wooden boxes six inches square and about 15′ tall, fronted with acrylic, and having sides slotted to accept metal xylophone keys which fit loosely enough to allow free vibration and easy rearrangement. The slots for the keys are angled toward one another, slightly, so that the surfaces of the keys present a series of alternately-sloped platforms for a small hard plastic ball which, when dropped from the top of the tower, will plunk its way slowly down to the bottom, playing a little tune as it goes. The balls are injected using a manual pneumatic piston which shoots them up a pipe to the top of the tower.