Sesame Street Walking Letters was one of the earliest lines of Sesame Street toys, produced by Educational Toys, Inc. (a division of Topper Corp.) in 1971. The sets featured plastic letters that "walked" on little feet down a ramp or across a table. Big Bird's Basic Walking Letters Set included a ramp and a set of six walking letters. In 1972 it was produced in Canada by Irwin Toy under license from Educational Toys, Inc. The letters were also sold separately.