I only hate all the annoying popups that mess up the experience for my kid (18 months). I just want him to be able to stick to one app, maybe even just scroll a

I only hate all the annoying popups that mess up the experience for my kid (18 months). I just want him to be able to stick to one app, maybe even just scroll and zoom around (I have no dedicated children's app, used Google Maps for example - or even the Touch Screen test app which displays colorful circles where you touch the screen). There are too many elements on the tablet that trigger some overlay over the current app and that are not easy to get rid off (for example the close button doesn't work while you touch some part of the app behind it).