why tell the world? just don't let your daughter near the new one unsupervised. Try checking for internal fuse I'm only guessing but it may have one.
if you are looking for how to repair if its possible it would be an idea to state what size plug? or transformer was used and the make and model of the piano.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix pianos.