Mobile development

I need an iPhone/iPad app. I already have a design for it, I just need it to be built. I would like to convert a children's book i have written into an interactive reading app/game. The book has: - 26 pages (letters A to Z) - 2 characters who appear walking around the garden - text to tell a storey on each page - random animals/things illustrated on each page The idea would be for the storey to be readout automatically or read out each word as you press on it. My pressing on the illustrated tree, the apples would shake/fall, birds would fly around if you touch them etc..