STEM Accredited by STEM.org. Perfect for brain development critical thinking and education. Step-by-step educational idea booklet with follow along ideas and instructions. Manufacturered by Magformers. Neodymium rare-earth magnets for guaranteed connectivity. Compatible with all Magformers shapes and accessories. Super strong safe and durable BPA-free High Quality ABS plastic. Conforms to CE ASTM and EN71 Ages 18 months and up. The original and authentic Magformers. Build with 12 triangles 18 squares 2D puzzle cards and 1:1 figure cards.