You guys would have loved my recent ORD-SMF flight on UA. Besides my own 7-year-old, there were a couple of babies and a toddler in F. I think the ratio between adults and kids was 1:1.

Surprisingly all (including the adults) were well behaved. The babies slept for most of the trip, the toddler played with a bag of toys his dad brought, and my son drew pictures (did a nice A-320 as a present for the flight crew which earned him a cockpit visit after arrival) and played with his Gameboy.

Prior to our trip, my son and I had a talk about the special nature of the front cabin and to be on his best behavior.