I've been collecting various old plastic gift cards (think debit/credit cards) in the hopes that I would be able to make this picture out of them in my mind. I'd need them to be in a uniform size/shape, so I thought I might be able to use the craft punches that you can use for scrapbooking and stuff. I've never used them before, so I'm not sure if they are strong enough to go through the plastic or not (and wouldn't want to chance it just in case without knowing).
Does anyone know of something that would be able to punch through them to make little centimetre sized squares? And if so, where would I find this thing?