build-your-own car kit

noun
UK /ˌbɪld jɔːr əʊn ˈkɑː kɪt/
US /ˌbɪld jʊr oʊn ˈkɑːr kɪt/

A build-your-own car kit is a box of parts you put together to make a toy car.

For his birthday, Sam got a build-your-own car kit and assembled a little red racer.


OTHER MEANINGS

2. A set of components and instructions for constructing a small motorized vehicle, often for hobbyists.

The build-your-own car kit included a motor, chassis, and wheels for a working mini buggy.

3. A do-it-yourself package for assembling a full-size or replica automobile from supplied parts.

Enthusiasts can order a build-your-own car kit and assemble a replica sports car in their garage.

4. A children's educational toy that teaches basic mechanics through car assembly.

The classroom used a build-your-own car kit to teach students how gears and axles work.