Duncan Butterfly Blue Yo YoTalk About Classic Yo Yos Since 1958, The Duncan Butterfly'S Wide String Gap Has Made It Much Easier To Land The Yo Yo Back On The String. This Model Is Best For Learning String Tricks Like ''Trapeze'' And ''Double Or Nothing''. The Butterfly'S Wider Shape Also Makes It Easier To Perform Basic Tricks Like ''Shoot The Moon.''Brand New In Original Duncan Packaging.