Carefully design 4 0-shaped concave holes,each of which has a number of small beads to push the middle module, which can move and rotate., This little magic bean toy is made of high quality materials,strong,anti-falling,non-toxic,environmentally friendly and durable.It is made of fall-resistant ABS plastic,and the concave-convex particles on the edge can exercise the children's grasping ability and massage the palm, Suitable for kids and adults to release the stress of study and work and relieve anxiety.These toys help promote a sense of calm,reduce stress/anxiety and can increase focus/attention.This is a great gift idea for kids and adults.It also very suitable for classrooms,homes or offices,very suitable for teachers,students and anyone else.,