TOYS, the front room of the house is the cat room. There is a cat couch, 4 beds, two Styrofoam boxes, two cardboard boxes and two litter boxes. There is one water bowl and a fountain. The toys are usually 6-9 balls assorted, 10-15 scrungies, 5-6 colored soda straws, 10-20 wads of assorted paper. The kitchen right behind the front room (all open, no doors) has a water bowl; litter box and 3 dry food bowls and usually 4-6 wet food dishes (paper plates)
The back room has a small fountian, one dry food dish, one wet food dish, one litter box, one track ball, 6 scrungies, more soda straws, 3-4 balls, 2-3 mice, and more paper wads. Up stairs we go through the same thing.
So as far as favorites go, it depends on what room, what cat, and the mood. They will bounce off the chairs, couch, their beds, and will try to dig for China in the litter box (LB, 5-8 minutes of digging before and after). The balls move all over the house, hard or soft you hear them rolling from room to room.