art GEAR you say? worked as a machinist you would not believe the large to tiny polished gears,mechanisems , links, fly weight inside machinery. Taking apart an engine timing gear stack is art like its self,, You remember the mad professor that use gear, and toggels and pullys and more GEARs to do something like break an egg or open the front gate of his home? Just a thought, it could be quite interesting and it can be made from only imagation and ability and just look like wow! wtf.
Treehouse, as in the children's television channel...? I've been out of the loop for awhile. Not my vote anyway, unless it's Miss Spider's sunny patch friends. bounce rocks! Apart from being a bed bug, that is ): I really like the idea of insects. SteamPunk-Insects would be cool, but maybe have insects in split into two sub categories for that and include Conceptual-Insects and there is the contrast everyone loves to see. For the ones who want to take it an extra mile, Conceptual-Insects vs SteamPunk-Insects as a third sub category in case there is a major influx of the one vs the other. Always equals fun.