There's a reason they're still alive. Say exactly what you think. Being deceitful will hurt everyone around you, and it eventually comes back to bite you. All work and no play makes Jack a dull boy. Trust in the good Lord.
Children have energy all the time because they have no worries.
Of course, you do have to remember that there's a reason people don't act like children children can be pretty dumb sometimes. Work more than you play. All play and no work makes Jack a dumb boy. Be curious, but don't be reckless. One or two wrong steps can be the difference between a closeup view of a waterfall and a closeup view of a jagged rock.