George here. Levi's piano teacher has a contest for her students, the "1 minute club", which is to be able to name the notes on both the treble and bass clefs, from shuffled flash cards, in less than one minute. Since putting something on the computer always makes it more fun... I made a program for him to practice. If you or your kids want to try it out, just download it to your PC, unzip it, double click on the "musiquiz.exe", and it will start. Hopefully. I haven't tried this on anybody else's computer yet :) Then it will show a note on the staff, and if you type the correct note name, it will move to the next one.