The Littlees are 7 and a half weeks old now. We still haven't put the roosting bars in the Cube, as letting them roost too young is supposed to be a potential cause of breastbone problems. The chicks, however, haven't read that book and are starting to show an interest in roosting.... on the Cube's wheels, on the feeders, on anything they can get their feet on.
So, I put a child's sized garden bench in their area. They're just starting to use it now.