Note Naming Practice
This is a great video that explains the staff. Although it is not interactive it does provide good information to people that are learning music. I encourage you to also check out YouCanPlayIt.com.
Practice reading notes. This is a perfect site for beginners.
Practice reading notes. This is good for beginners, but a little bit more challenging.
This website helps with note reading, and is separated by grade level.
This website is great for beginning instrumentalists. Practice reading your notes and identifying the correct fingerings.