C.J.
I sent my husband out to find one for the four year old. It was to pretend he was "Alvin" and I didn't want to deal with REAL guitar yet. He came back from the flea market with GREAT tennis racquet with a cover.
My husband used to play a lot and said that one was better than his super expensive one. It was $4.00!
OR ask around. SOMEONE always has one in their garage.