Start by giving two or three kids a scenario to play out. Record them for about two minutes. Then create a video in which grownups act out the scenario, lip-syncing to the audio of the kids talking. Results: comedy gold.
Bored Shorts TV has done several of these now, and they're a lot of fun. Some examples:
- Salesman and customer.
- Angel and dead guy. (Remarkably sophisticated plotting.)
- Principal and student. (Possibly my favorite.)
Sorry, I've lost track of who linked to this on Facebook.