The Blocked Account for Minors was specifically created for students that want to come to Germany for their studies but are not yet 18 years old. In that case, the Blocked Account is opened by a parent in their own name, stating the child as the visa applicant.
All processes must be finished by the parent, just like with the regular blocked account, but all relevant documents are issued with the child in mind and the payouts can be set up to a current account that was opened by the child.
More information on the entire process can be found here: https://www.fintiba.com/solutions/blocked-account-for-minors/