Whether it’s the delinquent Dennis from Dennis the Menace, the mischievous Calvin from Calvin & Hobbes or nearly any character under 12 in any number of TV sitcoms, one thing is clear: pop culture loves to portray children as loud and boisterous little monsters. Where, then, does that put the kids who are quiet and calm? Is there any reason for concern when your child isn’t an outgoing social cyclone?