Speaking as an ad-libbing elementary music teacher, that song's been all around the map! It's in several current music texts (I only look at samples, never buy 'em, so I don't know which ones), and I learned it in the late seventies at music ed school. The kiddies do love it- right up there with Waltzing With Bears and Beans in my Ears. And All Gods Critters. If I had a nickle for every time I've sung 'em.....