1. Water-based paint coloring, multi-layer coloring, color uniformity 2. Edges and corners are polished smooth, does not hurt the hand 3. Natural rubber wood base, wear-resistant and drop-resistant 4. Color classification, five colors and geometric shapes 5. Shape cognition, set of column game 6. Creative puzzle, exercise hand-eye coordination, develop brain imagination 7. Material: wood 8. Size: about 29 x 6.2cm
