I have no idea at all what these are. My first thought was sand dollars. Then I began to suspect these could be some plastic thingies that were washed ashore or that people threw on the beach. Any idea?
This is the view from above
When I turned it
This is the underside of another one, which obviously differed from that in the last photo.
This is another one - probably similar to the first one before the brown coloration began disappearing.
A blue one!
Any ... yet another color - could all these be somebody's dress buttons?
Closure of Ewens Ponds for spring renewal
2 weeks ago