The Spin-Ball offers appealing multi-sensory stimulation. The different "slices" are in a rainbow of colors to elicit a harmonious feeling, and to develop the ability to differentiate between colors. The mirrored internal side panels create interesting reflections. On the internal vertical axis, there is a two-sided smiling face. All this produces an interesting visual effect that stimulates baby's sense of sight. The moving parts emit a pleasant "klik-klak" sound, and the rotating face offers a soft rustling, to stimulate baby's sense of hearing. The texture, in the form of little bumps on the slices, invite baby to grasp and touch them, and to feel the difference between the rough external surface and the smooth internal surfaces.