Tired of your fatigued houseplant? Want to perk up a party table with an upturned chandelier? The upside-down, helium-filled mobile is a gas to watch and educational for the kids too. The tastefully colored balloons, made from low-leakage foil, come in various forms: spheres, cubes, egg-shapes, etc. They strain against a base, via tiers of strings/ribbons and cross ribs/wires.-- FarmerJohn, Jul 20 2002 Fall Up Fall_20Upelaboration on this mobile, also by FJ [swimswim, Jun 22 2009] See if you can grab a croissant off this floating serving tray-- thumbwax, Jul 20 2002 Or you could get one of those upside down mobiles that uses the heat from a lamp to flutter tissue paper.-- DrCurry, Jul 21 2002 random, halfbakery