Three One-Line Violin Riddles for a 4-Year-Old

Here are three one-line riddles about a violin, each followed by the answer and a tiny, easy hint:

1. Riddle: I have four strings and sing when a bow rubs me — what am I?
   Answer: Violin
   Hint: Four strings + played with a bow = violin.
2. Riddle: You tuck me under your chin and I make sweet sounds with a stick — what am I?
   Answer: Violin
   Hint: Under the chin and played with a stick (the bow) = violin.
3. Riddle: I'm a small wooden friend whose strings hum when you move a bow — what am I?
   Answer: Violin
   Hint: Small, wooden, strings that hum with a bow = violin.

Say the riddle out loud and think about the clues: four strings, a bow (a stick you move), and resting near your chin — that helps you find the answer!