Board Thread:ROBLOX help and discussion/@comment-25205336-20140923133241/@comment-4196050-20140923201733

Directly, no. Indirectly, yes.

Users using DevEX must have a Paypal account, and you cannot have a Paypal account until you are 18 (because Paypal requires a credit card, you must meet the minimal legal age to have a debit/credit card). I'm sure there is a loophole to this where you use your parent's Paypal instead of creating your own.