Altoid tin alterations are pretty popular among the hacking community, but this one takes it down in size. Using the Altoids Slim tins, Instructables user Joshua Zimmerman put together these bite-sized LED flashlights for under $5. With just a tiny bit of drilling and soldering, you could easily assemble a handful of these in an hour or two.
A few notes:
Clearly, we can add vinyl records to the list of materials wood glue is used for.
I've never found a spray glue that doesn't wear off in a matter of days.
Just like this chart, I absolutely swear by the power of hot glue. I recently used it as the only adhesive on my Halloween costume and it held together superbly.