The subjects of original Micromodels included among other things, Trains, Planes, Ships, Boats, Buildings, Cars and a Dragon. There were 82 original Micromodel Packets. From these packets one could make up 121 separate models. Micromodels also released some items including how-to booklets and powdered glue. Heighway continued to release models from 1941 until he became seriously ill in 1956. He died in 1959. There were several models that Heighway had mentioned in his catalogs and advertising, that for one reason or another were never released. These were known as the "Might have beens."