Why should you never give Elsa a balloon?
'Cause she will let it go.
Elsa and the Balloon
Explanation
Explain Bear
Okay, so basically, Elsa from "Frozen" has ice powers, right? And the punchline is a reference to her super popular song, "Let It Go." So, like, she'd literally "let it go" 'cause ice powers, duh! It's funny 'cause you wouldn't get it. You probably still play with balloons.