Pressing the button plays 8 melodies (20 seconds) and 2 instrument sounds. This was a toy my child used to play with when they were small. Operation has been confirmed, and the sounds work without any problems. I think young children will enjoy playing with it. Batteries are included. There are no noticeable stains, but please understand that this is a used item and that the assessment is based on a visual inspection. Please purchase only if you agree to these conditions. Immediate purchase is welcome! Returns are not accepted. Items are usually shipped the same day. Thank you.