“Avenue Q” is a entertaining puppet-filled musical that’s anything but child’s play. Blending clever humor with heartfelt storytelling, the show tackles the awkward, uncertain, and often absurd realities of adult life—things like finding a job, paying the bills, and navigating relationships—all through a cast of puppets and humans living together on a rundown New York street. Though it looks like a children’s show at first glance, “Avenue Q” is full of witty, mature themes and songs that poke fu