Help with my iPhone app

Hi all,

I'm a middle school science teacher and I am creating an educational iPhone app for younger students (like preschool). I would like the input of other teachers/school tech people as to how to improve my app. It's already for sale on the app store, and it's called "Games for Kids" (original right?) Easiest way to find it is with a search for "eieio" which is my company.

If you feel so inclined, use one of these free codes below (like an itunes gift card) and download it for free. Please let others know which code you use in the comments.

Any feedback would be really valuable.

CODES:

1. 6K7P677YT3HA

2. 3PX6XY6KWHYY

3. TRE396RA7R93

4. 4W9YPXWXML3K

5. YW69KHN3M4FE

6. JXLE97F3PNYF

7. JE97F33PAP49

8. H4NFYWKPRMHE

9. AT9RKMKENAY3

10. NFJR43JTYX93