I'd say look into super glue- or even better than super glue, rubber cement. I'm an art student (in college for animation, but I do a bit of everything) and I can honestly say that rubber cement is WAY more efficient in MOST cases than super or hot glue. It's fairly cheap and can be easily removed/cleaned up using either Bestine (a brand of solvent) or a rubber cement pickup (sort of like an eraser for rubber cement.)