Elmo Pull Along Baby Toy Opens And Closes Mouth With Cookie Monster Inside 2003. WE CHANGED OUT THE BATTERIES AND IT DID NOT DO ANYTHING FROM THE BATTERIES SO WE BELIEVE WHATEVER THE BATTERIES ARE SUPPOSE TO OPERATE, IT DOESNT WORK. THE PULLING, OPENING, AND CLOSING ACTION WORKS GREAT. AS YOU PULL ELMO ALONG, HIDDEN INSIDE IS COOKIE MONSTER. BE SURE TO CHECK OUT OUR EBAY STORE FOR SESAME STREET TOYS