I just downloaded the Team Umizoomi Numbers app. It's $3.99 but worth every penny! My son is 3 and half and by playing a couple of days with the app, he's adding and substracting numbers less than 5. And it's really cute and has lots of different games in it. Highly recommend. It's the best app i've downloaded in a while.
Re: Ipad app recs please
https://itunes.apple.com/us/app/my-first-puzzles-snakes/id399175118?mt=8
https://itunes.apple.com/us/app/preschool-memory-match/id368542467?mt=8
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