Piano problems

We are not huge piano players over here yet.  The kids are in a music program that we love and this next year they are starting piano.  We don't use our piano much but the other day I went and hit a few bottom keys and no sound came out. 

  I opened the lid and found an entire pack of flash cards inside the piano!  I spent half an hour gently removing all the cards.  I couldn't get a picture of how far down and spread out they were.

Thanks kids!  No one will own up to it but I have fingered Hayden as the guilty party :)