Celluloid

Celluloid is a type of plastic that was invented a long time ago in the late 1800s. It was one of the first types of plastic invented and is made from a special kind of material called cellulose.

Picture taking a bunch of tiny fibers, like the kind that is in the pages of a book, and squeezing them together until they form a solid material. That's basically what celluloid is.

People used to use celluloid to make all kinds of things like combs, buttons, and even toys! However, over time, people realized that celluloid was actually pretty dangerous because it could easily catch on fire and release toxic fumes. So now, it's not really used anymore except in some special cases where it's needed for specific things like certain types of film.

Overall, celluloid is one of the oldest types of plastic and was used for a lot of different things, but it's not really safe to use anymore because it can be dangerous.