the.com/model kit

means A boxed set of pre-molded plastic (or resin/metal) parts you cut, sand, glue, and paint to assemble into a miniature car, plane, ship, or figure.

from 'Model' traces back to Latin modulus, 'small measure,' via French modèle — the idea of a scaled-down stand-in for something real is centuries old, used for architects' mockups long before toy aisles existed. 'Kit' is murkier: it shows up in English for a soldier's or workman's bag of equipment, possibly from Dutch kitte, a wooden container or tankard. The two words only married in the 20th century, when manufacturers started selling 'kits' of parts to build your own scaled 'model' — plastic injection molding after mid-century turned it from a hobbyist's woodworking craft into the sprue-and-glue ritual we know now.