Any way to play with a car with open top

How can I play with a convertible car but with open top any body help me pleaseeee ?

Cobra, Art Morrison Corvette, Ferrari California - premium.

Caterham Fireblade, Plymounth Prowler (might be called Chrysler Prowler) - standard.

Quite a few open top race cars such as Chaparral 2J, Yoyota 7, Mazda MX5, also some of the open top Le Mans such as Audi and BMW.
 
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