It’s a building block obviously. Errr… maybe not obviously?
It conjures everything you describe, except (for me, anyway) “child-like.” I know it’s a children’s toy, but something about the sharpness of the lines and exactness of the orientation conveys something more grown-up. Like designing toys. Thinking-oriented toys.
This is not a negative observation, in any way. (And I love the “I ◈ WEB” concept!)
The only thing that rubs me wrong about it is that it’s an orthographic drawing. It makes it seem like the top (back) corner is too pointed …adding a little bit of perspective could be a good thing. But this is a very minor issue (and I’m probably in the minority of “people who would ever notice”).