How to pay for my kids apps? Here is the story. I have two kids (5-7 years), they have their Android tablets... and I have the credit card. I have created two google accounts, each for one tablet. I want to buy apps for them, but I don't want to enter any details of my credit card to their google accounts, because the theory is that they will be using these accounts in future to communicate, browse etc. I don't want them charging my card without my knowledge.

A while ago, when buying something in the google play store, I was able to select between one of the tablet accounts and my own account. I then had to enter the password to my own account and was able to install the given app. Now this seems no longer to be possible.

I am lost. I am a 40+ year old Un*x user and I am confused and frustrated by Android. Is there a way of buying apps for my kids that is safe?
There's a much easier way, but it may not be supported in all countries: Buy them each a Google Play Gift Card, and attach it to their accounts. They come in different "sizes", so you can limit the amount they can pay. No identification stuff connected to the cards, and once they're used up there's no more use for them (of course, you can buy the next one).

Another positive aspect: you might decide to let your kids use them themselves. The danger is just as high as the value of the card (though content might pose a risk). So it's like "pocket money" for learning "monetary responsibility" :)