Toddlers and Music

I know there are several of you on here who are musically talented, so I'm hoping you can help me out! My (almost!) three year old is very into music. She loves to sing and play around on the piano. Are there any things I can do to help her begin to learn the basics of playing piano and learning to sing? If the best thing I can do for her is to just let her bang around on the piano, that's fine! But if there are things I can be doing to help her start learning the notes and how to read music, I'd love to help her.