pre-school apps for Android

[sacbina]

any recommendations for a 4 year old?
many thanks

Hi,

Im a single dad and I've recently started writing educational apps for young children. I've just released my first, to helps kids practice recognizing vowels in the alphabet.

www.robincodeworks.com/vowelplay.html

Would be grateful for any feedback

My immediate thought was that it should either be a mixture of upper and lower case or just lower case (as a teacher, the former is more desirable). Hope this helps.