Unadulterated: take something not meant for a gaming table and alter it for use on a game table. But the only alterations you can make are with paint. No drilling, attaching, modifying with bits. PAINT ONLY.
@Punktaku : make a dice rolling tower disguised as scenery for the game system of your choice
“Pop, pop, pop music"
Make a model inspired by music - it could be the physical embodiment of some lyrics, the band itself touring grungy underhive bars, or a lone minstrel trying to convince a party that "combat flute" is a valid and useful skill set to take dungeon crawling.
@Ben_S : Size doesn't matter.
Make something for any of our usual games (Necromunda, Mordheim, etc) that's either smaller or larger than usual for what it is.
@SuboptimusPrime : Beastmaster - Pets. A luxury to some, a weapon to others. Build and paint a warrior with a faithful fuzzy/scaly/silvery companion.
Build and paint something inspired by a work of fiction. A figure inspired by a fictional character, some terrain inspired by a fictional world or place, a diorama inspired by your favourite fictional moment, the whole of literature and cinema is at your finger tips.
Checkpoint: build a check point of some type, like something between two rival territories. This can be between House Zones manned by gangers, between Hive Zones manned by enforcers, an entry port between the hive and the ash wastes, or maybe you’re uphive and it’s a star port! Weigh stations, toll bridges, Troll bridges (for Mordheim, of course), are also all possibilities. Even a gun check at the local watering hole.
One Piece: using only a single item, convert it into something for the game of your choice. Use all of the item in your build. You may cut up the item’s parts in any way you need, so it doesn’t have to remain “as is” at all.