Q 1: Is it permissible
to deposit the money of underage children in a bank dealing in interest,
whether national or international, and whether owned by Muslims or non-Muslims?
A:
It is impermissible to deposit money in banks which deal in Riba (usury), unless it is a case of necessity. If they are obliged to do that to preserve the money, they should deposit it without taking any interest on the deposited money.