Fun and wisdom early education, relieve boredom and stress. A new decompression puzzle product developed for children's brain development, combined with the common characteristics of fingertip tops! Concave-convex particle massage palm.The use of anti-fall ABS material with concave-convex particles on the edge can exercise children's grasping ability and massage the palm. OPERATION METHOD: carefully designed 4 O-shaped concave holes,each groove has a number of small beads, which can move the small beads by pushing the middle module,disrupt the position of beads of different colors,then start thinking about how to match the colors of the balls and holes. Personal interaction, partner PK :Parents can promote personal relationships during play, and it is also suitable for children's play to expand the social circle.