Big Bird's Rhyming Book is a 1979 Sesame Street pop-up book. Big Bird begins a rhyming game, naming a word and then asking for a rhyme. His friends join in -- Cookie Monster asks for a rhyme for "rock", and Oscar the Grouch supplies him with "clock", "lock", "sock" and "block". Count von Count finds that "cats" rhymes with "bats". An intrepid Prairie Dawn finds that she can "swing" off an airplane's "wing". Ernie and Bert discover that Big Bird has a "rocket" in his apron "pocket". And so on.