It's not like it's hard to find a pumpkin that sits in the carriage but if one can be printed...

https://www.tinkercad.com/users/cuuFmHKaorv-fmcquatters

It prints fairly smooth for a tinkercad design. the polygons matched with the .3mm layer thickness wind up working out really well for the project. the walls are a perfect thickness for its size, its a very sturdy design. i even impressed myself sometimes