I had to look this one up to see if it was an aftermarket conversion - had never heard of the model Felicia Fun, and certainly never seen one, which may not be that strange, since - according to Wikipedia - only 4016 were ever built.
The car is quite bizarre: the wall behind the driver can be folded back, turning it into a rear seat... in open air!
Tarps and hardtops were offered as extras, to provide protection for any rear seat passengers, as well as goods stored on the truck bed.