Thanks... I did not think about the confusion, but you are right. My article contains the hint, that I build an RFID based music box for / with my daughter... and of course my programming effort to print labels for the RFID stickers ;)

She is SO happy with this thing, it is a pleasure to look at her still using her wooden RFID tags to play "The Bare Necessities" from The Jungle Book and dancing in her room nearly every day - she is 3 now.