NOTE. I don't know what year this little educational gem came out - the tags on it say 1950s, but I think it was much longer ago than that. Just the idea that boiling water in a glass container is revolutionary dates it to the '40s or even 1930s. But what really places it in time for me is the background music, a song called You Took the Words Right Out of My Heart, which appeared in a movie called The Big Broadcast of 1938 (Bob Hope's first film, and the first appearance of Thanks for the Memory - I might do another post on that one because the lyrics are so great).