Does my child need to have a data plan to use their card in-store (tap)?
Your child will need the internet while setting up their Mydoh account and using the app.
Once they have received their physical card or have added their digital card to their Apple Wallet*, they can make in-store purchases without any phones or internet!
*If your child has an iOS device, after they have added their Smart Cash Card to their Apple Wallet, they no longer need data or the internet to pay in-store with Apple Pay. Currently, Apple restricts Apple IDs of less than 13 year olds from adding their card to Apple Wallet.