That is why the questions above are about how the app behaves rather than what it contains. A coloring app for a two year old is judged on how forgiving it is. The same app used by a five year old is judged on whether there is still something to do once the easy pages are finished. If you are looking specifically for coloring games for preschoolers, our piece on
educational coloring games for preschoolers takes the games side of that question separately, including why a calmer game works better than a fast one.