...you've had a rough day. The baby is teething and crawling. The older kids have had to entertain themselves even more than usual. You feel like a sucky parent.
The baby finally passes out for a nap, and you think to yourself how you really "should" do something educational, or at least of some sort of developmental quality, with the older kids. So you track them down. They are watching TV (guilt? welcome to overdrive!).
Then you notice. They are watching Mythbusters.
Yeah. They'll be okay. ;)