hostels don't allow kids..or anyone below 15 years old. kasi hostel rooms are either dorm type so 4 bed bunks or a private room but double or single bed lang. then shared toilet facilities usually separate naman girls/ boys. shared kitchen. shared dining and living area. coin operated na laundry.
but most hostels or backpackers will not allow anyone below 15 years old. your best bet is to get a hotel or a studio type accommodation like quest but it is a bit on the pricey side talaga.