Tree Block´s latest addition is the Math Kit, which helps children learn the math concepts and the metric system with a wide variety of unlabeled blocks made from hand-cut branch blocks. These simple materials allow children to grasp mathematical principals up to the level of algebra by stacking blocks next to other objects imitating Greek and Egyptian methods of measurement, and achieve a tactile understanding of the metric system. Comes with colorful wooden spinner (not shown) and activity booklet.