Sidewalk Chalkboard amazon Office Products Office School SuppliesCreate eye catching messages using this double sided A frame sidewalk sign The frame is made of black finish wood with grooves to allow blackboard inserts to slide into place Sidewalk Chalkboard opening sequence of the American animated television series The Simpsons is among the popularized opening sequences in television and goes along with one of television s most recognizable theme songs The first episode to use this intro was the series second episode Bart the Genius The standard opening has had two major revisions blackboard also known as a chalkboard is a reusable writing surface on which text or drawings are made with sticks of calcium sulfate or calcium carbonate known when used for this purpose as chalk Blackboards were originally made of smooth thin sheets of black or dark grey slate stone Sidewalk Chalkboard and supplies Rust Oleum Specialty Chalkboard Paint creates a fully functional and uni