sensory balls hedgehog/diamond Tullo 483 2 pcs blue/red Tullo sensory balls set is recommended for both children and adults. Construction made of durable material free of BPA and heavy metals. The use of balls brings a number of health benefits, such as: correction posture defects, balance exercise, stimulation of blood circulation, stimulation of sensory receptors, treatment of flat feet and valgus of lower limbs in children, reducing muscle tension . Technical data:· set includes 2 pieces (1 hedgehog shape and 1 diamond shape)· diameter: 15.5 cm