Go to your local erotic bouncy castle rental place and ask to see the non-erotic section. They'll probably have a Spongebob pineapple house for birthday parties and such.
They might have one in the erotic section too, but that's your business.
Sorry I dont know where they sell pineapples to Slavs, there must be some other way to signal to your local community that you practice a Swinger's lifestyle.