“LearningTown” follows a fictional Paul and Storm as they try to keep an old-style kid’s show (in the spirit of Captain Kangaroo, Mister Rogers, etc.) going after its original host dies. They hire a producer (“Cookie Tuesdays”) away from a rival show to help them; and they also enlist the help of a superfan (“Teddy”) to handle the puppets. But the challenge is steep, not only because they have no idea what they’re doing, but because they have radically different ideas about how to run the show, and there are lots of other characters who help and/or hinder their cause along the way. Oh…and puppets sometimes catch fire.