Typical alphabet building blocks a bit too square for your kids? Letterboxes are a prototype toy from The Design Office that would foster their understanding of font design before they can even pronounce the word “computer.” Made from recycled cardboard, Letterboxes are a set of four inch cubes which divide the 26 letters of the alphabet into geographic parts that may be assembled and stacked in any direction to create myriad shapes and letterforms. Parents can indulge their font fanaticism by downloading the free font the designers developed to promote the idea of sending this learning tool into production.