I found that no place is sacred or off limits to kittens or cats. They go wherever they darn well please. At least mine do...chairs, couches, beds, underbeds, window sills, etc. Gotta love 'em.
I have 3. Cleo--into everything! Tabby--just sits waits for things! Blu--real fatty now--found in a parking lot and real skinny--hides whenever anyone comes. Only "momma's girl"