Material : Wooden Size:4.2*3.5*13cm Specify： *The soft color does not hurt the eyes, and guides the perceptual aesthetic while the baby's color recognition is enlightened *The painting is safe, no irritation, no fading, no BPA *360° smooth polishing, no burrs and no corners *Rubber wood, uniform and fine texture Function: *Building blocks, exercise grasping ability, develop fine movements *Put the shape on the corresponding set of columns to improve the baby's ability to recognize the shape, exercise concentration and patience, inspire logical thinking, and help brain development