What is the prepositional phrase in stomp mud puddles after a good rain?

The prepositional phrase in the sentence "stomp mud puddles after a good rain" is "after a good rain".

Here's why:

* Prepositional phrases start with a preposition (like "after", "in", "on", etc.) and end with a noun or pronoun (the object of the preposition).

* "after" is the preposition.

* "a good rain" is the noun phrase that acts as the object of the preposition.

The prepositional phrase modifies the verb "stomp", telling us when the action takes place.