Lava lamps are very nice things to have. I love to sit and watch lava lamps.
One thing that could make them even better is to impregnate the wax with a thermochromatic dye that changes colors at the same temperature that the wax changes bouyancy from float to sink (and vice versa). And maybe the liquid inside. Then we'd have a multi colored shifting lava lamp.
You could watch the thermal currents, not just the wax.-- DesertFox, Jan 13 2005 Previous version Cooler_20lava_20lamp [robinism, Jan 15 2005] GB 2399446 http://v3.espacenet...C&IDX=GB2399446&F=0A lava lamp wherein one of the substances may be phosphorescent or be thermochromic [xaviergisz, May 31 2005] Good stuff.-- 2 fries shy of a happy meal, Jan 14 2005 Wax? That's lava!-- robinism, Jan 14 2005 Now that's an idea!-- FarmerJohn, Jan 14 2005 Very excellent.-- calum, Jan 14 2005 hmmm not quite thermoelectric but not a bad idea...-- madness, Jan 14 2005 Cool - now get back to coding!-- zen_tom, Jan 14 2005 Essentially the same as a previous idea on Halfbakery. (see link). Redundant...?-- robinism, Jan 15 2005 just saw the autoboner... 13:34 GMT, 15/01/05-- david_scothern, Jan 15 2005 random, halfbakery