(c) absolutely - compare with Drawing Pad, where you can purchase colouring books in app. It has a config option to hide the IAP store, which avoids all the awk

(c) absolutely - compare with Drawing Pad, where you can purchase colouring books in app. It has a config option to hide the IAP store, which avoids all the awkward questions. I don't mind purchasing additional content in a premium app. If the app is good value by itself then additional sets for $3 a pop is fine. But I don't want my kids to see this option - as far as they are concerned, the app has what it has, and extra books appear magically from time to time.