while in wilkinsons today getting some more bin cages to replace them nasty rotastack super pods, i saw these little bird houses, so bought 3 of them to go in the new cages for little houses. they can csleep in them, chew them and climb on them and they look nice also.
http://www.wilkinsonplus.com/invt/0261460
the top can removed and there,s a hole big anough for hammies to get into.