A tip of the hat to my younger child, who walks a good mile each way to school each morning (and back in the afternoon), for pointing out these fascinating sculptures hanging in the yard of a house several blocks over. I don't know who lives there but I sure admire their sense of whimsy.
This mobile appears to be made from trays:
This one from barbecue grills (if you know your math or if you've read The Phantom Tollbooth, you'll recognize this shape as a dodecahedron:
And this one (a bit on the dark side) of umbrellas:
Who needs a museum when you've got neighbors like this?