24-piece Unit Bricks set (extension to 100-piece set)Budding architects can build even bigger with our 24 piece Unit Bricks set a perfect complement to our best selling 100 bricks set. Weighted and measured the same as our standard bricks, this extension set includes more units and half units for building on those STEM based foundations. Can also be used as a starter set for children newer to block play. Beautiful and built to last heirloom quality Hand carved textured wood is tactile and weighted to