C-Blox are a great manipulative toy for young and old. From simple stacking to creating modern art, they are fun at any level of development. For your little ones they are a great introduction to spatial concepts. Crafted from locally sourced, sustainably harvested maple hardwood, this set of C-Blox is unfinished. The base block unit is 1" and each dimension of all blocks is a multiple of 1" so blocks can be stacked cleanly and uniformly. This set of four nesting C-Blox contains two 1x2x3 blocks, one 1x2x4 block, one 1x2x6 block, tip sheet and storage pouch.