Satscard to store btc

I am having another kid 2 now both young i want to save them some bitcoin .01 to start off. I find the satscard with the QR code behind it easy to have grandparents/ relatives gift them sats but is it safe for long term storage? 18 - 20 years roughly. Any downside to satscard or thoughts on other solutions . Thank you in advance!

Edit: i should also add the cost of a satscard is cheap compared to buying 2 more hardware wallets.