M38A1 JEEP 4X4 UTILITY . Plastic model making is an area of model making in which models are mainly made of plastic (today mostly polystyrene). These are usually non-powered stand models, where the interest is more on a high level of detail than on robustness or function, but with which can also be played with limited. Predominantly kits made from prefabricated parts are used. Less often you can find kits made of deep-drawn moulds (Vacu kits) and pure resin kits.