Meet the Whirly Board: a handy tool designed to improve your balance. It lets you practice spins of 360 degrees or more. The Whirly Board lets you strengthen your muscles and improve your agility. It could prove useful for water skiing, skateboarding, and wakeboarding training.
The board measures 32.25″ x 8.75″ x 4″ and weighs under 6 lbs. It is available with two surface types. More information is available here.