[hapasaparaz]

It's very normal.

Doing a very simple an unexiting activity like watching the breath is intended to show you what the mind is really like, then it's a process of bringing the mind back again and again after each time it tunes out. Watching the breath is like a mirror or baseline from which you can know the state of the mind and you can train it and watch it's progress, it's frustrating at first but look past the frustration and stick with it.