Training for the hand muscles. The handy stress ball with world ball motif is perfect for relaxing, reacting and training the hand and arm muscles. Wanderlust Stress at work and really wanderlust ? The globe ball is just the thing for stressful days in the office or at home. Perfect for stress relief. Simply knead the soft ball vigorously against frustration and worry, the squeezing trains motor skills and strengthens the muscles. Practical companion: the anti-stress ball for relaxing and frustration relief fits perfectly in your handbag or backpack with a diameter of 7.5 cm and can thus relax the hand muscles optimally on the go or when travelling. Ideal gift for travel lovers. The anti-stress ball is the ideal gift idea for all travellers and globetrotters.