Riddle

Causes dancing in children when it fills up.

Choose an answer

A.A balloon
B.A water gun
C.A bathtub
D.A bladder
Hint: It's a 2-word phrase with 8 letters, starting with "A".

Answer

A bladder

Why this is the answer

A full bladder makes children do the classic "potty dance" as they try to hold it in.

This riddle is filed under Hard/Difficult Riddles and rated Medium.