Starbucks offers redemption codes every week for their current pick of the week from the iTunes store. Every so often, they feature children’s app like Dora’s Skywriting ABCs app which is normally $3.99. http://itunes.apple.com/us/app/doras-skywriting-abcs-preschool/id405566203?mt=8
Supposedly, they have new codes out every Tuesday. Since I don’t drink coffee myself, my BIL picked up the Dora one for me on his regular Starbucks run. Usually, they have a small display near the register with cards with the redemption code.