I knew my daughter will have to learn about odd and even numbers, even before it was taught. I was presented with a golden opportunity to teach her this when Delhi had the odd- even rule for cars. First was the concept of odd and even. After the initial pairing off exercise to show what is meant by odd and even, the simple rule was: any number ending with anyone of 0,2,4,6,8 was even and any number ending with any one of 1,3,5,7,9 was odd.
So the game that I played with daughter was this. I took “even” and she took “odds”, and we had to count how many cars had these, and who got more cars. This pushed the playful but competitive streak in my daughter and in no time she was able to just look at any number and determine odd and even within a few seconds