When in the right mood, I take things super literally. "Dad can you move?" Then proceed to wiggle about. Typically in front of the tv.
Occasionally I'll be asked to fill a water bottle, I'll offer every suggestion but water. "How much milk should I put in? None? Crackers? Honey? I don't think our dog fits."
I also get asked "do you know what would be a crazy idea?" Which is my time to shine, they've typically got something in mind with trains or Lego, but I'll start with "53 chickens going to the movies, in one trenchcoat" or something similarly bonkers.