Use this palette! Make 16x16 icons. Likeso
Any person is free to make any number of tiles they feel like that can be completely unrelated to my tiles or they can continue some of my tiles. Anything from 1 tile to 16 of them. They post them here. Tiles will pile up for a few days (I'd say 'whatever we do just today!!' but I think that's pretty unrealistic. Anyway we'll know when we have enough) making little 'exquisite corpses' with each other. Try not to make too many tiles that continue your own tiles cuz where's the fun in that? Keep in mind you don't have to follow anyone else's tile if you don't feel like it, you can just make your own stand-alone tiles.
At the end of a set time we gather up the tiles we have and we can then do two wonderful activities. One of them is to assemble the connected tiles in obvious (and less obvious!) ways. At this stage we are free to alter the tiles of another person slightly (background colors etc) so they fit, but not super-too much, where's the fun in that. After - or sideways - to playing exquisite corpse with each other, we can see if we can make bigger pictures with the tiles we have acting as meta-tiles. The possibilities are endless in this! After a week is done, we collect and make a banner and feature as usual, listing the names of the participants and giving out cookies for happiness!
This ends on 16/8! Get to it