You can find some very cute treble and base cleff fishy
notes at susanparadis.com.
If your child is learning the notes on piano there is a
very cute icecream activity at laytonmusic.wordpress.com
Here she has plain keyboard cards with a dot. (Like the
icecream part below.)
You can use them as three part cards, placing the key
board and letter onto the full card, you could play memory,
matching and so forth.
Here is a colorful keyboard you can use for helping your piano player to identify certain notes.
Your kids can build their own keyboard with the printout there.
Again, I would only use any of the activities above for about five
minutes in any one class (and would probably only do one little
activity because my kids are still very young). I’m just sharing them
all at once so you have an idea of the resources I have on hand.
Visit http://www.susanparadis.com/ for more wonderful music related teaching aids.