Cascade Elementary School Soccer Field

This past Thursday, Dad and I hit the soccer field behind Cascade Elementary School.  Dad found a Haste watch, mechanical pencil, a mood ring, some clad and a small pebble that registers like a dime.  The pebble is too light to be lead... not sure what it could be.
I had a great night I found 18 quarters, a presidential dollar, and a couple silver rings, including a ring that has some nice stones (still have to take them to a jeweler).