If you've been relying on giving your kids allowances to buy apps on iTunes, that's going to be put to an end by May 25th. Those who are trying to sign up for iTunes allowance now are being prevented by Apple. This feature automatically replenishes a kid's balance every month with a set amount ranging from $10 USD to $50 USD, which keeps kids from accessing your credit cards. Existing allowance money can still be used though.
What Apple is encouraging its users to do is use Family Sharing, which gives up to six family members access to each other's purchases. They also have an Ask to Buy feature, where the children can send a request to their parents when they want to purchase an app.
Source: Engadget