London bricks, but is it art?

Off to the Science Museum with my sons to day to see the " Wallace and Grommit" exhibition - good fun, but not a lot of science in it. These wet bricks in the tunnel to the museum caught our eye. Amazing colours and although they look textured, they were very smooth.

Then off to the Serpentine Gallery to see the Jeff Koons exhibition. not my thing at all, but prompted some interesting debate with the boys about why was his work considered to be art but the interesting bricks weren't.