Tina is up late doing work on her computer. Callie is up late because she couldn’t sleep and wandered from her bedroom into the kitchen.
At our house if a kid hasn’t fallen asleep after giving it a good try then she is often allowed to get back up. She may not bother the adults or get wound up — we still want our kid-free adult time! — but is free to float about the house like a little ghost until she’s tired enough to try sleeping again.