The Hubelino math blocks Number Walls support children in learning the basics of mathematics through play. The set contains 230 printed blocks that can be used to assemble number pyramids. The calculation principle is simple: the sum of two adjacent blocks equals the value of the block directly above them. This provides an intuitive understanding of addition and subtraction. The blocks are fully compatible with common interlocking brick systems. The scope of delivery also includes a practice book with research questions and an accompanying poster. Made in Germany, this educational game is suitable for children aged six and older.