I recently got a couple of sets of Alpha Monsters printed for at home (nothing fancy just your run of the mill photolab prints). I then painstakingly laminated and trimmed them all to make them jammy finger proof and Voila!
I had intended to use the sets to play fun Matching/Memory games. However the helpful machines at the photolab kindly print the jpg file names on the back of each print, therefore giving away the whole purpose of the game. I could have used this to my advantage, but thrashing a 5 year old at "Pairs" by cheating, just didn't seem right somehow.
Ah well! At least he's happy to make his own fun with them.