We live in a 3 bed house and have a DD aged 2 and DS aged 7 weeks. One room is big and could easily take the 2 children sharing (I am thinking when DS sleeps better as DD is a light sleeper) and the other room is a box room (about 6ft x 7ft). Those of you that have a boy and girl sharing what sort of age were they when you decided they shouldn't share anymore? If you use a similar size box room as the bedroom could you give me any ideas about furniture, etc? I am thinking of a cabin bed if DS ends up in there instead.