ABC Letters is:
A game designed to occupy small children and to help them learn their letters. Three colorful pictures of letters are shown (both upper and lower case are used) and a speaker says the name of a letter. Your child can guess until they find the right answer. A reward screen is presented and allows them to play the sound again or go to the next question.
There are currently 2 speaker voices and over 150 pictures included in the game.
I had a user tell me that any issues with an application "freezing" can be resolved by powering the iPhone / iPod off and then on again. He informed me that, since he rebooted his phone, ALL his applications have been running smoothly.
* Please make sure that the PHONE IS NOT IN SILENT MODE (The switch on the side of the phone should be UP) and SETTINGS | GENERAL | SOUND EFFECTS is set to BOTH.
** You need to use headphones or an external speaker on an iPod Touch (as it has no internal speaker).