This app shows random letters from English Alphabet.
-can show only vowels
-can show only consonants
-full screen letters, so it's good too use the app in a company of kids or friends.
-configurable min and max value. Default range is from A to Z.
-letter is refreshed using touch/click.
-a dark color scheme for the UI to save battery power of your device.
-applicable for all age groups.

Enjoy!