Learning Resources Time Tracker Mini Visual Timer, Classroom Timer, Hand Washing Timer, Auditory and Visual Cue, Ages 3+ 4.8" x 3.3" x 3.3" - Walmart.com
Apple Watch Update Will Detect and Time Hand-Washing
Amazon.com: HONWELL Timer for Kids Battery Powered Tooth Brush Timer and Bathroom Hand Washing Timer with LED Color Light Great Gift for Children and Teens Training Coach (2 Pack) : Health &