Hi. I'm planning to record a MYO card as a gift for my granddaughter (who has a yoto player and an account -through her parents). I have my own Yoto account (but no player). I live in a different city. I can follow the instructions to record, create playlist, link to a blank card on my phone via nfc (in my account). But, once made, will the card work in their player? Do I have to join that family's account, and the linking is done through their player? I hope not, because then the family wouldn't get the surprise I'm hoping for.