teaching kids greek

Does anyone have any advice and/or experience teaching Greek to elementry school children? My seven year old sister has expressed interest in learning (knows the alphabet), and I also have a possiblity of teaching homeschool groups or as an extra-curricular class at an elementary school. The only curriculum I know of for that age is the “Hey Andrew, Teach Me Some Greek” at www.greeknstuff.com.
Any advice, warnings, or whatever would be most welcome!

Have a look at this. I am not sure if it would work for a seven year old, but anyway.

http://www.amazon.com/exec/obidos/ASIN/080784800X/

Judging from the reader comments, I might need a guide to work with AGA. But I do need this kind of primer, especially in order to expose both me and my daughter to a good deal of AG that are meaningful in everyday’s life.