A waterproof wireless mouse. So..it can be used in the shower.. :)
A spin off idea would be: Mouse on a rope.
Which leads to: The shower tile mouse pad.
And for the swimming pool: The floating waterproof wireless mouse and floating mouse pad. (I haven't googled yet for that but I got a feeling it probably exists.)
D from BC myrealaddress(at)comic(dot)com BC, Canada