Chemistry Sets usually came with some test tubes in a stand, some chemicals, various tools like tweezers and spoons, sometimes a little spirit burner, and a booklet telling you what experiments you could perform. They ranged in size from little ones with just a few chemicals, to huge ones with what seemed like dozens of chemicals and all kinds of cool equipment.
Did anyone actually follow the instruction booklet after the first few dull experiments (Oooooh, vinegar turns litmus paper red ;-) I certainly didn't. A spoonful of this, a dash of that... One time I mixed something quite potent. I'd corked the test tube and shook it - next thing I knew, the cork flew out of the tube, and a virulent, electric-blue foam exploded all over the brand new wallpaper. By some miracle, it was washable wallpaper, so I got it cleaned up, and my Mum was none the wiser. I did tell her about it - but not until about 25 years later!