Trading
If you'd like to keep and trade a lamp you see in the shop, you should buy two of them.
If someone has a lamp you really want, you're free to offer more than one lamp in exchange for theirs.
Etc
I planned on using better lava lamp sprites but in the end I thought I'd leave them with a PUGS style. Hopefully the shape made it less annoying to turn on and change songs.
*Midnightwolf's challenges
I'm giving out some personal rewards to people who take part in collecting and/or trading the lamps.
If you think you might be interested in entering lava lamp contests, you need to keep a log of each lamp.