My 7 year old is very smart, and sometimes I clearly fail to understand the the difference between being nice to her, and over explaining things. Her knowledge is wide-ranging and thorough, and my wife and I are glad that while she wants to be a surgeon in the future, she has agreed she may benefit some form of medical training before operating on actual people, and not - as she claimed previously - know enough already from YouTube.
Me: I have plugged my phone in, but if you need the charger for your tablet, you can just unplug my phone.
S ((7 y/o): I know Daddy. I know physics!