Sorry, I don't actually have any.
If I were to look for some, though, I would go to a private piano teacher for advice. They usually know where to look. I am fortunate -- there is a music store 2 minutes 34 seconds from my house (i have too much free time) so I can go there whenever I want. I understand others may not be so lucky, but it's amazing what people can notice when they look for something (hint: yellow pages)
I started playing at 5, and I love watching the little kids start. They love the music very much
. Be careful, and always challenge your kid just enough so he keeps playing. All too many that i know have quit at 10 years. Encourage him well. Have fun looking and playing! I can't help you more.