Logan,
You made a very logical conclusion this week. You counted to nineteen, and then proceeded to onety, onety one, onety two, onety three, etc.
It really does make sense, right?
Onety
Twenty
Thirty
Forty
etc...
As I considered your logic, I did determine that according the pattern in the Base 10 system, onedy might be a more logical replacement for 10 and the subsequent teen numbers, rather than an insertion prior to twenty; however, your observation was still a very good one.
Unfortunately, despite your insightful discovery, we'll have to work on returning to the universally used number system.
Your conceptual understanding of place value at age 3 is absoultely delightful. Nice thinking, son.
Love, Mom