I've been thinking about building a small (coffee table sized) Transformers spacecraft that could be a good playset for my kids. I was thinking about using two 25 gallon plastic trash cans as the base, carve them open to join together and build some sort of hinge that would allow them to unfold. The surface wouldn't be too tough. I plan to use concentric PVC pipe for the thrusters and add surface detail with bits of plastic rubbish and score the rest in a gridline pattern. The toughest part, IMO, will be the hinge mechanisms and ensuring that it all lines up nicely when closed. Has anyone tried anything like this? Off the top of my head, junker Star Wars ships would be good sources of material for starter detail. I would call it "the Ark" even though it might not resemble it much other than being a big brown TF ship with giant thrusters on the back.