A deck having a horizontally oriented top wall and a vertically oriented side wall and an opened bottom. The deck has a front and a back. A pair of front wheels extend from the side wall adjacent to the front. A pair of rear wheels extending from the side wall adjacent to the rear. An open front is formed in the side wall forwardly of the front wheels. An open side is formed in the side wall laterally between a front and adjacent rear wheel. An open rear is formed in the side wall rearwardly of the rear wheels. A motor is mounted in a central region of the deck with a rotatable drive shaft extending vertically downwardly therefrom. A rotatable blade is mounted on the drive shaft.
