The idea for ABC Grow first emerged when Fabian Harb discovered a 1970s phototypesetting typeface made from several layers, just like the rings of an onion. With the help of specifically-developed software, a multi-layered font was created that allows for six basic outlines to be grouped together to form a total of 63 different combinations. A series of alternative characters are available for a more economical feel. The display font is entirely uppercase, and also includes fractions, roman numerals, arrows, and ligatures. Each combination can be purchased individually, or the entire set.