Premium , materials,non-toxic and harmless. Sensory toy,long and rubbery spikes are useful for kids to develop senses and exercise finger dexterity. up your for time,divert your attention from stressful work ,study or in line or waiting for friend. Easy to carry,small size allows you to operate with hand, and portable,convenient to carry it in the bag. Interesting ,for ideal for family or friend,help them pass the for time,keep in the mood and have a good for time.