Dimensions: Approximately 17.5cm (W) x 9cm (H) x 13cm (D). Battery Requirements: 3x AAA batteries (not included) Dimensions:Approximately 17.5cm (W) x 9cm (H) x 13cm (D). Battery Requirements:3x AAA batteries (not included). Who would have thought something so small can be so effective and addictive not to mention fun, fun, fun! Forget about tapping your fingernails, clicking the top of a pen or ...