The Health Promotion Board has a new song called Washy Washy Clean (MP3) for pre-schoolers to help them cultivate the correct hand washing habit. Lyrics (PDF): "We start with washing palm to palm. Between each finger, let us rub. Now the back of the hands, it’s such a simple plan. We washy washy clean, scrub scrub." So catchy I wanna go clean my hands now.
(Thanks Mr Big)