I can't speak for the kindle but for Apple products, I just went into the App store and did a search for Toddler games. I have several on my phone that my 2 year old loves. One of them is called Animal Puzzle where he has to drag puzzle pieces over to a photo and put the puzzle together. He has another app where its an educational game where it will ask you to find various colors, shapes, numbers, and letters.
DD loves agnitus and monkey preschool lunchbox. Agnitus is neat as it provides a report card so you can see how well your child is identifying shapes, colors, numbers, letters, etc.
Re: Good apps for 3.5 year olds?
Derek - February 2013 Caelyn April 2011