Turning Spiral w/ Balls Sensory Wall Activity Panel by HABAFast turning brings the balls into orbit. Plexiglass holds the balls in the unit. The "Turning Spiral w Balls Sensory Wall Activity Panel by HABA" is a fun sensory wall activity Wall Toy for children. Great for schools, daycare centers, and any kids play and waiting areas. Use Guide Rails and combine with multiple kids activity "Sensory Wall Panels by HABA" to create a custom Sensory Wall where the Activity Panels easily interchange by sliding in and