See How to Wipe a Computer to learn how to get started. A complete wipe of your computer will probably do the trick. Only someone with very serious forensics equipment could recover your data after a wipe.
Seriously, you will struggle to get them off a fridge. You can break fingers with these things. And for the love of whatever you pray to, don’t eat them and don’t let your pets eat them (pets, in this case, includes kids).
