Comment by rmunn

It did as of six months ago when I evaluated Scratch and chose Snap! instead for teaching the beginning-coding class I had signed up to teach. Scratch had lists, but they were only allowed to contain text or numbers, not other lists. To make a tree, you need to be able to nest lists inside other lists. Snap! allows lists to contain any kind of data, including other lists, or even blocks. And it allows blocks to take lists as input, which is another thing lacking from Scratch. Snap! also includes the standard basic list-manipulation functions like `filter` and `map`, which aren't in Scratch at all (naturally, since lists in Scratch can't be passed as input to blocks).