Looks like a contraption, but I'm not sure what it does. It reminds me of a computer game I used to play called "Marble Drop". Pretty unique, Joanie as are most of your wonderful creations.
'Monster Bob' :D Don't know why but that came up first to mind when I thought of a title. It looks like that big piece is the monsters body and head and the rest is his hands.. :) Great creation! ;)