Camping out

My grandsons and I slept outside in the tent last night. In the morning, I asked D, "What sounds did you hear when we were in the tent?"
He said, "I didn't hear any sounds!"
It's true, he did fall asleep pretty quickly, but even while I was reading to them before we turned off the flashlights, the crickets and the cicadas were nearly deafening. But he apparently didn't notice anything.
Later I asked K what sounds he heard.
He just rolled his eyes. "Crickets, cicadas, airplanes, cars, trucks, trains, car alarms, fire engines..."