The Calder and Hokusai exhibits at Seattle Art Museum are amazing. We tried to get the Calder mobiles to move without touching them (or getting busted by the guards) by discreetly blowing at them, with some success. Two of my faves are shown here.
The one with the brass gong actually could ring, I think, but we weren't able to apply the right wind.
The fish is not as simple as it looks.
@ImagineThat
When I was a kid my mom bought a Calder mobile for my dad's office. I am pretty sure it was a copy, not an original. We didn't have that kind of money. But it was gorgeous and exquisitely balanced. Not too big to hang in the corner of a room. Very much in the style of your first photo.
We just called it "the mobile" and it wasn't until much later did I relate to it.