Plastic Gundam model kits consist of several trays of parts or "runners" that either snap-fit (most post-1990 models) or require glue (older models prior to 1990) to put together. The cover image on the box, or box art, is usually done by an illustrator with a picture illustration of the subject mecha design in action. All plastic Gundam models kits are supplied with stickers and sometimes decals to apply extra colors and markings as seen in the show, movies, manga or video games. Smaller or lower grade kits often require paint to give the model a finished appearance.