For some reason other apps such as fisher price Giggle Gang had sound but the Learn and Laugh did not. I double clicked the IPad home button. Then swiped the bottom bar to get to the sound/brightness controls. My sound was turned off (line through speaker icon). I clicked the icon to un-mute. Problem solved. I dont know why Giggle Gang was not affected, while the Laugh and Learn app was.
Gb#66 about Laugh & Learn™ Shapes & Colors