My first encounter with carnival glass was in London's Portobello Road street market many years ago. A stallholder told me that the name comes from a time when objects made from a special type of pressed glass with an iridescent glazing were awarded as prizes at carnivals, fetes and funfairs in the US.
I didn't much care for the orange-coloured pieces, which are the most common variety, but thought that some of the other colours were beautiful. I started buying items of carnival glass here and there, but was never a serious collector.
I now know from looking at images online that there are far better pieces available than I ever saw. I am very happy with what I have though and don't plan to add to my collection, but I do wish that I had bought more of this glass when prices were very much lower.
Here are some typical examples of carnival glass:
I have a jug and goblets just like these: