My four year old loves my iPad and I'm quite particular about what I install for him. It doesn't have to be literacy and numeracy, just fun and creative. He loves an App called Art Maker by ABC's Play School, by the Australian Broadcasting Corporation. The fact that he can record his own voice and make a little movie has opened his world up to being a storyteller.
Does anyone have any recommendations for similar "educational" type apps? Good quality content, no advertising or in app purchases with a creative angle.