Do you remember a soap craft?

In the 70s i remember my mother made some kind of soap sequin thing with a craft kit.I remember it had little pins and you stuck them in the sequins in a pattern or all over it.I remember her doing this with several different soaps and brands.It was a basically a nice smelling decoration.Has anyone heard of this? I also remember her doing it with just plain pins. I have tried typing in several differnt parameters trying to find anything on this but find nothing.Does anyone else remember this?