At what age is it possible to buy a Netflix Gift Card?

I'm 13 years old and would like to buy my sister (16) a Netflix gift card worth 25 euro for her birthday. May I already buy such a card in Austria at the age of 13?

Once you've pocketed money, you can buy something like that.

And, have you plugged in money?

Yes 😂 ok thanks

Then off to checkout.