I had opened minor account with IDFC for my 6 months old child 4 years ago via RM who came to home for account opening process.
Took just 2 days to get account activated and received minor's debit card within a week which was issued by default.
Later our accounts got automatically upgraded to Wealth and received new Wealth debit cards for both me and minor account.
So far good experience with IDFC for minor account, only limitation is Minor's Debit card cant be managed online, so any limit modifications etc. need to be done via branch via hand-written application. Pin can be set via IVR Call.
I guess this is standard rule across all banks regarding Debit card not available online to manage until child attains 10 year above age.