Cats seem to have a thing about small enclosed spaces. Mine loves to climb into the drawer of a roll-top desk and hide in the space behind the drawer inside the cabinet. I once accidentally closed the drawer locking her inside. She sat there quietly not making a sound till I realized what must have happened and let her out. Then she wandered out looking extremely pleased with herself. The same happens with wardrobes when I open one to get clothes out - she hops in sometimes without me realising and then sits quietly inside if she gets locked in. She loves this game so much that she has learned to open the door on one of them and will open up and go in of her own accord if she feels like it.
The interesting thing is she started the game with the roll top desk when she was a tiny kitten. Now that she is a rather large cat and has to wriggle and squeeeeeeeze to get in, but she still manages to do so.
She regularly climbs into any bag I leave on the floor and while I don't have a changing bag she happily clambers into my camera equipment bag or even into a plastic shopping bag or paper bag if I leave one where she can get at it.
If the weather is cold and I am wearing a nice warm coat or woolen jumper she will climb onto my lap and paw at the coat or jumper and meow softly, asking to be let in. Once inside she curls up and goes to sleep quietly.
They are great little animals.
