npub128yhkplq5utyq3xvy0xe3zv3m5etlvcaqk77khv6spyjgvqcszkqehsnu3 (npub128y…snu3) Here's one I used to tell in the third grade. My classmates liked it, but they were an easy audience:
Q. Why should you never punch Darth Vader?
A. Because the Empire Strikes Back.