"Mom," M said at breakfast,"Did you know that if you add 2 to an odd number, you get an odd number? Then if you keep on adding 2, you keep on getting odd numbers."
Just now as he was drawing, he said, "If you keep on adding three to numbers, you get the same pattern we have now; even, odd, even, odd…"
I would get out the Miquon book and let him do some odd and even pages to follow his enthusiasm, only right now he is cheerfully taking pictures of me at the computer with the old digital camera that we thought was broken, and any cheerful occupation is a blessing with busy M.