Scratch Blocks brings together two different programming “grammars” that we have designed over the past decade. The standard Scratch grammar uses blocks that snap together vertically, much like LEGO bricks. For our ScratchJr software, intended for younger children, we developed blocks that are labelled with icons rather than words, and snap together horizontally rather than vertically. We have found that the horizontal grammar is not only friendlier for beginning programmers but also better suited for devic

Source: Scratch + Google = Next Generation of Programming Blocks for Kids — MIT MEDIA LAB — Medium

I love the accessibility of Scratch, and what students can get from it. Google support will be able to push it even further! I’m hoping Scratch will drop its reliance on Flash and move toward something more open, such as HTML5.