All-round, only antenna design not very durable

The car is robust and runs easily on parquetry in the apartment, on concrete in the courtyard and on the grass in the garden. My 5-year-old son comes with the control handle outstanding. The design consists of a black, stable base and a colorful plastered, white plastic shell, which gives its shape to the car and will only put on and fastened with two Drehrigeln. Naturally, this is in our car quite scratched from various crashes - even down the stairs.

Deduction there but for the antenna design: Here comes a thin Käbelchen from the black base, about then a thin plastic tube is threaded, which you in turn must fumble through a hole in the upper shell. The Käbelchen has unfortunately suffered much - I do not think that it keeps for a long time. One way to easily exchange I do not see.