First you have to find all the dream jewels.
Secondly find all the photos
Third you must put the photos on the wall
Fourth find the crank (for me it was near the stairs)
Once you found the crank put it in place then a crowbar will appear. Use the crowbar on the loose floorboard and inside you will find the key.
Use the key to unlock the piano, then click on a picture to hear the tune.
Go to the piano and it will show you how to play the tune. A
fter the piano is finished playing it's your turn to play that song. Repeat for all the songs untill finished.
Once all the songs are complete you will be able to leave.
 
Good Luck :)

Depending on where you live, your local library might have the game you can borrow. Once the playfirst game is installed you can use it without the disk in....from there you can make a waiter