One kid starts teaching the other. Another sign of losing control. A small, little one, sure. But I know they already trust one another more than they trust me. Oh yeah. They're in this thing together. Team Toddler.
Within a day they'll have the safety handles on the doors figured out. Then the drawer latches. And then the lock codes on all the phones and tablets. Within a few years, trikes, bikes... Life is a 24/7 prison break. They'll never stop now.
At least the tickle fights slow them down. A little.