Geniteen Building Block Set, Saint Basil'S Cathedral Architecture Model Micro Mini Blocks, Educational Mini Blocks, 4300 PcsGeniteen Building Block Set, Saint Basil'S Cathedral Architecture Model Micro Mini Blocks, Educational Mini Blocks, 4300 Pcs Material: The Building Block Set Is Made Of Durable Plastic, Safety From Harmful Chemicals. The Smooth Surface Of Each Bricks Make It Has Good Compactness. It Is Strong Enough To Hold Onto Another Brick But Easy Enough For A Child To Pull Apart. Educational Value: This Micro Mini Block Set Is Made Up Of 4300 Pieces Micro Bricks,