Bought for my chattounette active, the toy can be assembled to be used or I remove the "white mouse" to shake myself! She adores, very good price / quality ratio.
Beware though, the mouse has a tendency to loosen and a small hole to the spring level lets out the grains that make noise (normal) inside ... provide a small piece of tissue to hide it, and do Please turn the screw the spring time mouse to time!