It is not because it does not even claim to be science. The often associated religious or/and esoteric part is something, putting me off for years (it still does). But the thing itself has a quite rational essence. Helpful for me:
At the end it comes also to dukkha and other Buddhist concepts I don't care much about. But before, it served me very well in his quite accessible approach to what I would call 'mind cleansing'.
On-topic: In my opinion the whole thing is nothing for very young people, in particular not for children.
https://www.amazon.com/Mindfulness-Plain-English-Revised-Exp...
At the end it comes also to dukkha and other Buddhist concepts I don't care much about. But before, it served me very well in his quite accessible approach to what I would call 'mind cleansing'.
On-topic: In my opinion the whole thing is nothing for very young people, in particular not for children.