Scratch is totally awesome, but the huge conundrum has always been where to go "after Scratch". Python isn't it, because its too textural and you can't easily share graphical games unless the recipient also has pyGame installed. Javascript hasn't been it for a lack of appropriate on-ramp, and many of the available resources (eg, CodeAcademy) are too vocationally-based and lack the fun of Scratch.
But there's now a free online tutorial system aimed at "Scratch kids" who want to take the next step. http://s2js.com -- tutors kids through the bits of Javascript they need to know in order to write graphical games that'll run on their smartdevices. It's tutorial, simple development tool, private image storage, and deployment facility all in one.
It's "Javascript as told to Scratchers", and the goal is to provide a bridge that gets them from the delights of Scratch, onto something else that will take them on their journey. S2JS isn't the destination, it's the "enthusiasm transfer tool".