Many children may not know that there are numerals other than what we call Arabic numbers or digits. Roman numbers were indicated by using certain letters and these are explained. The example given is one of the more common uses of Roman numerals—watch faces, but observant kids will see them on buildings and at the end of a movie. The way to count using Roman numerals is explained, but no real rational is given for the way four and nine are depicted versus three and six. In one case you use subtraction and in the other addition.