Yeah, for context, they just turned three (twins). I don't expect them to have perfected emotional coping skills at this point (though they're certainly both well on their way).
I'm sure every kid is different, but in the case of our daughter, her emotional maturity really seemed to develop around the time she turned four.
For the two kids that need 'coaching', what happens when you're not around? Will you at some point leave them alone to deal with things solo?