Semantic point: nice and kind are not the same thing.

The nice thing to do when somebody is behaving poorly, is to ignore it until it becomes untenable (firing them, leaving them, and so on). The kind thing is to address it and let them change their ways.

Wanting to be nice is baked into our social structures - nobody wants to be seen as the un-nice person - but being kind is where relationships and interactions get strong. You just need to do it with empathy.

Indeed. Take the kids out to do something active or just kick a ball or look at the squirrels.