Your project is vastly more specified than a toy project, because it has a real customer (you) who will expect it to work after it ships. That expectation is what separates toys from real tools.

I bet you could write a word processor in an hour. It might only add or delete one character at a time (no selections). It might persist only to a hard-coded "output.txt" filename. You might have to kill the process because there's no quit operation. But that would suffice for a toy word processor.