Tweensitting 

Looking after tweens but not paying too much attention to them because, hey, they're not little kids anymore...

Tweensitting is some easy money I tell ya'.

Tweensitting by ApricotFields July 2, 2020

Teensitting 

Looking after a teenager with the same attentiveness you'd give a pre-teen, regardless of whether this is justified or not.

With every other adult out, I was expected to be teensitting all day.

Teensitting by ApricotFields June 18, 2020