While trying to find a new approach to 'distract' Tanooki into putting on his pajamas the other night, the 'Tickle Detector' was invented by his mother and iterated by me with the watch the following night. It has three states:

  1. Solid white: standby mode (as in, get your teeth brushed and start getting ready or the tickle detector won't work)
  2. Scanning mode: Waving my wrist around while he changes, we discover tickles in socks, under arms etc.
  3. Error mode: No more tickles found - time for bed.

(Otherwise known as the Control Center Flashlight in watchOS)