“On Broadway” is a mix of that and the Saturday-morning classic “Pee-wee’s Playhouse,” staged on a near-exact re-creation of that series whacked-out set. Many characters return, both human (Miss Yvonne, The King of Cartoons) and not (Magic Screen, Globey). So do many of the elements, from a “Penny” claymation cartoon to the infamous “Lunchroom Manners” […]