58 parts BPA-free Organic paints and dyes Solid hardwood 100% earth-friendly Recommended Age: 3+ STEM.ORG Authenticated Hand-carved wooden blocks that mimic the beauty of building bricks will increase in beauty with use. Build forts and palaces while developing fine motor and early STEM engineering skills. Based on childcare expert Caroline Pratt's scale standard unit blocks. The mini brick is 1/8th of a Pratt scale brick. Compatible with Mini Unit Bricks and Mini Unit Rocks Encourages explorative and open-ended play Introduces mathematic foundations, logic and problem-solving Great for hand-eye coordination, fine motor skills, and balance building Built-in storage case made from eco-friendly cardboard with picture examples of buildable structures Organic water-based color and non-formaldehyde glue Made of 100% sustainably grown, compressed wood (HDF) Contain zero plastics and are completely non-toxic All Unit Bricks products conform to major international safety requirements for toys (ASTM, CPSIA, EN71) Designed in Thailand and the USA Each set includes 58 hand-carved Mini Unit Bricks tabletop blocks. About Mini Unit Bricks Inspired by our standard Unit Bricks, our Mini Unit Bricks are scaled downsize of a standard brick making them ideal for smaller spaces, table, and floor play. Mini Unit bricks are tactile and sensory, build fine motor and cognitive skills, and foster interest in key mathematical concepts. Made from the compressed roots of the rubber tree they are also 100% Earth-Friendly and of the same high quality of our standard Unit Bricks. Built to last are bricks your children’s children could play with.