Gunnar got to sleep in the big bed, with me, last night. Everything was quiet. We were snuggling and he was drifting off to sleep.
Then, from who knows where, he asked me, "Mom, are there really such things as Black Holes?"
Hmmmm. "Well, nobody can actually prove it, but scientists see evidence for them."
"Oh. Well, then there must be White Holes, somewhere, that squirt everything back out."
Having solved that problem, he dropped right off to sleep.