[ksaj]

Visa and Mastercard both have gift cards available at gas stations, grocery stores and corner stores everywhere you go. There is no age restriction with those. You just need enough cash to buy one.

Likewise, a lot of banks have changed their debit cards to VISA debit cards so they can be used like credit cards, again regardless of age.

[kotaKat]

Not even that, Amazon lets you pay with cash now relatively easily on its own.

https://www.amazon.com/b?ie=UTF8&node=14583169011