I've been struggling with getting my PDA kiddos to wash their hands - and I'm such a germophob that it's extra triggering for me. Other timers hadn't worked for us to cement this task completion every time or for long enough.
But this one has! Took a month of being there and me reminding and now it's embedded as part of the routine. My boys thrive on routine expectations even though they're demand avoidant to daily demands. The novelty factor of this - the visual light up aspect and the ding sound when the 20 seconds are up, has been enough to get us over the line and I haven't seen a skipped / too quick handwash. So thankful!