Fisher-Price released a line of "giggling" Sesame Street toys starting in 2007. The tagline reads "Guaranteed to Make You Giggle". These toys require batteries to operate; they sing, giggle and speak simple phrases. Most feature both Elmo and Cookie Monster, with occasional appearances by other characters.
Shake, Giggle & Roll Ball moves randomly when activated
2-in-1 Giggle Guitar Elmo guitar flips to Cookie Monster bass
Double Fun Giggle Ball Plush Elmo/Cookie Monster ball