Interactive Alphabet ($2.99 on the iTunes store) is an engaging iOS app that helps build the literacy skills of your youngest learners. The music is pleasant to adult ears, not cringe inducing, and the graphics are just cute. Dancing robots, anyone?
The app features 5 different modes:
Baby – A guided A to Z touchable tour (ages 1+)
Explore – discover hands-on interactive letter toys (ages 2+)