A kit is a set of components that has to be assembled by the buyer or at the site of use to get the definitive product. Examples:
Electronic kit, a package of electrical components used to build an electronic device. Kit car ("component car"), an automobile that the buyer assembles into a functioning car Kit bike Folding kayak Tent Prefabricated building of houses provisional military engineering constructions like Mabey Logistic Support Bridge Space station Much of IKEA furniture A lot of kits are sold for model building