Just education and toys. The simplest ones like this aren't even Turing-complete, so you couldn't really program much in them even if you wanted to as a weird c

Just education and toys. The simplest ones like this aren't even Turing-complete, so you couldn't really program much in them even if you wanted to as a weird challenge - they're more like automated Etch-a-Sketches. They do make for good languages for toy robots, though - for instance, you can use Scratch with Lego Mindstorms in a way that's not much more advanced than Logo.