This is an imprecise answer, but sometime between 1989 and 1996. I remember loving it on our 1989 trip, then it not being offered the next time we visited in 1996. Like most of these kinds of attractions, the entertainment level was highly dependent on the showmanship of the guide.At WDW? When did they end that? I loved doing that at Disneyland, but don't remember that it was offered at WDW.