I've made wall plaques with 2.5D models and a nice poem or sentiment personalised to the recipient from the people giving the gift. It's amazing how when it's personalised it means so much more. People generally treasure hand made things that are not only nice, but is unique and personal to them.
Notice I said "things that are nice", I can't tell you how damn loofah pack's we've gotten over the years!
Another gift that always is appreciated, is along the lines suggested earlier but with a slight difference, we occasionaly buy the cheap 6 x 4 photo frames, toss the frame and keep the glass, and cnc a new (usually rectangular) frame out of mdf with a 2.5D model, and again, a poem or relevant sentiment, along with a cutout for the glass, so it becomes a personalised photo frame. It's not only practical, but a very thoughtful gift.
cheers,
Ian
It's rumoured that everytime someone buys a TB6560 based board, an engineer cries!