Kids challenge themselves to jump, jump, jump to the music and make it over the two telescoping poles as they revolve around the base unit. Miss a jump and the poles become unbalanced creating some sad sounds. Three speeds and an acceleration mode keep everyone jumping. Works great with two kids jumping at the same time or as a party game. Builds timing, motor planning, and endurance. 4 C batteries required; telescoping poles fold up for easy transportation and storage. New Design! The bar has 3 height adjustment levels making it more successful for a wider range of children.