How to use a Google Play gift card

Google Play not only is the largest app store in the world but also a music subscription service, a bookstore, and a video store. Google Play gift card make an excellent gift (hence the name), but that's not the limit of their use. Since Google restricts underage users from Google Wallet, Google Play gift cards are the only way for your munchkins to purchase content. Here's where to find them and how to use them.

source: androidcentral