One of the glorious presents of Christmases past, speaking from my own childhood, was the Chemistry Set. It was always wonderful. First there was a little box of chemicals, test tubes, alcohol lamp, and book of experiments. The next year a bigger one: two shelf units, hinged in the middle to stand free, with more chemicals, more test tubes, litmus paper, and I don’t know what all. Then the big boy: a very wide back shelf unit, and two thick shelf units that were hinged to it and could be folded shut to make a locked box. I believe this guy had an Erlenmeyer flask.