A "preposition" is grammatically anything a frog can do to a toadstool. It can be on a toadstool. It can be under a toadstool. It can be around the toadstool. It can be...a toadstool? Yes. Yes it can. But that's just a standard present tense verb with a third person singular subject. So.

Imagine an infinite number of alternate dimensions, sliced thin like salami and all layered together in a delicious sandwich of universes. In these parallel strata of time and space, the Squishables are very, very different.