I’m remembering this scene from a book I read ages ago, I was probably a child when I read it, so it was probably published before 1990 or so. The scene is of a mouse or gerbil that is enticed to run in its exercise wheel by a piece of cheese mounted outside the wheel. Just to make sure the mouse understands, the cheese is helpfully labeled with a sign that says CHEESE. The wheel might have been part of some Rube Goldberg device, but I’m less sure about that part than I am of the cheese labeled with the sign.
What book did this appear in?