Learn your limits. If you can do two things at once, that's fine. If you can do three, that's fine too. So if you're doing your limit and another directive is heaped on you, you need to recognize that as a warning sign, and resolve it. Or as that famous Air Mexico pilot once said when he was asked to slow to 250 Knots, after being cleared from 350 down to 17,000' by New York Center: "I can slow down, or I can go down. Your choice." The man knew his limits.
Also tell your kid to take lots of photos and make lots of friends, because he's (or she's) got a long life to live and the friends you make in UPT will be there with you forever.