A Proper Drum Kit

Why makes this Joke funny?

This joke plays on a pun involving the phrase "repercussions" and the word "wee."

1. "Repercussions": The word "repercussions" typically means the unintended consequences resulting from an action or event. Given the context of the joke, one might expect something related to the consequences of not buying the proper drum kit for the son.
2. "Wee": In some English-speaking regions (notably Scotland), "wee" is a colloquial term for "small" or "tiny."

The punchline, "wee percussions," cleverly combines the two words. It refers both to the miniature drum kit ("wee" or small "percussions") and plays on the idea of minor consequences ("wee repercussions").

So, the humor comes from the wordplay and the unexpected twist in the punchline.