It'd have to be pretty gentle, so it didn't break... maybe some kind of fan could blow it?
[Sketches in a rotating fan, then crosses it out.]
No, that's too hard. Maybe the other kind of fan.
[A hand-held fan appears. After a pause, he draws it balanced on something sticking straight up. After another pause, he draws some water dripping down onto the handle, at regular intervals.]
Every time the water hits the handle, it gets pushed down and the fan part goes up.
Re: [Day 18, early afternoon]
[Sketches in a rotating fan, then crosses it out.]
No, that's too hard. Maybe the other kind of fan.
[A hand-held fan appears. After a pause, he draws it balanced on something sticking straight up. After another pause, he draws some water dripping down onto the handle, at regular intervals.]
Every time the water hits the handle, it gets pushed down and the fan part goes up.