Epsilon likes loud noises.
When there are no cars outside our window, he'll provide his own noises.
Bang go the toy cars.
Its been thunder storming a lot recently.
"Bus! Bus boom!"
I've explained to him that the clouds in the sky are banging into each other causing the noises he's hearing.
"Cloud boom! Cloud boom!"
It is truly adorable to see him wake up on cloudy mornings, look out the window and give a hopeful "cloud boom?"
I feel a bit guilty about the misinformation I am perpetrating, but I can't figure out a way to explain vacuum and static electricity to a toddler.