- Stimulate sensory perception and improve finger strength, flexibility
- Hundreds of soft, rounded “porcupine quills” cover surface
- Measures 3-1/2" (90 mm) Diameter
For finger exercise, grip improvement and various games of skill. Help to stimulate sensory perception and improve flexibility and strength in the fingers. Hundreds of soft, rounded "porcupine quills" cover the surface. Can be used for tactile discrimination activities including form, size and weight when used in combination with other balls.