Still not doing a really ambitious post, but what are you gonna do?
These kinetic sculptures by Lin Emery are quite something. They strike me as quite playful. Whether the process of making them was playful I don't know, but the movement of the objects appears as a kind of play.
Incidentally, this is the better of two videos I found with the same subject and similar images. The other was on Vimeo and its musical backing was... unfortunate