Montessori Sensorial Math Curriculum Design: Classic Montessori Binomial & Trinomial Cube math material, designed to visually demonstrate algebraic binomial & trinomial formulas through 3D solid blocks. Comes with matching control pattern boards for self-correction matching work Two Classic Cubes: Binomial Cube (8pcs colored wooden blocks + 1 control chart) and Trinomial Cube (27pcs colored blocks + 1 control chart). Different red/blue/black/yellow color coded blocks help kids distinguish volume, dimension and algebraic composition rules intuitively Premium Solid Beech Wood: Made of high-density solid beech hardwood, every block precisely cut with tight seamless assembly; all edges manually polished smooth without burrs. Eco-friendly water-based, vivid color coating durable against scratch and fading, safe for young kids to grip and build Boost Spatial Logic, STEM & Problem-Solving Ability: Children assemble scattered blocks back into perfect cube shape following control chart patterns, effectively develop spatial imagination, logical reasoning, concentration and early algebra pre-math skills Perfect Homeschool & Classroom STEM Gift: Essential standard supplies for Montessori preschool math shelf and homeschool STEM station; exquisite wooden storage box with flip-open side doors for tidy storage. Ideal birthday & back-to-school educational gift