Mushroom mosaic?

I have a big mushroom in front of our cottage, that I had hoped would grow flowers and moss, but my thumb is purple not green and I can't get anything to grow on this mushroom....so I tried plastic plants.  Yes I did!

Well, that doesn't work for me either...so as we were enjoying yummy barbequed oysters at a family gathering, I had a great vision...

A mosaic of oyster shells covering the mushroom cap.  So now I have a bucket of yucky oyster shells waiting to be cleaned and a large project in front of me waiting to be birthed.  

I guess I know what my weekend will be about.