The Sensory Unviersity Toy Company Bounce Around is one of the best products ever created for complete sensory stimulation. This product provides a source for cardiovascular fitness, gravitational awareness, tactile stimulation, gross motor development, and even visual perception. This unit has a sturdy steel frame and padded hand rails for safety. This is the same product used in Pediatric Clinics and Gyms all over the Country. Ages 3 and up.