LOL Belgo! DS1 went to creche - but they don't take them until they're 4mo here. Darn it! Done feet, though. So, need to ask a special trained nursery nurse - how to do it, and how to get the paint off. Because my newborn has red paint under his fingernails now. (And still no handprint...)
I did prints using that ink that reacts with the certain type of paper, so you don't end up with muck everywhere. Bought a kit on eBay for a couple of quid and it was alright, recommend having more than one sheet of paper as DD wiggled about a bit and one print has 7 toes! I tried when she was asleep but it's hard to get it firmly pressed. I taped the corners onto a haynes manual [finally, a use!] and used that as a firm surface to press against. Don't forget with hands to roll palm to tips of fingers. rather than stamping down. same with feet heel to toes.
I've scanned mine into the PC to edit them. Took out the 6th and 7th toe. Recoloured for a few creative cards as presents.