I love long answers - sometimes that's how we get ideas we can use. Counting was never an issue for GD, including skip counting. She understands 10's, 100's, 1000's etc. (at least as far as reading the nos). She has had basic add & sub concepts down for over a year, but will still count on her fingers if I give her a problem (although she can do in her head if she doesn't think too hard about it). Patterns etc. came early. However, I've been trying to think of a way to work on money & had planned to play store. Using an allowance to buy real things sounds even better. Don't you love that he came up with the "infinity symbol" comment! He sounds like a great kid. I think GD is more verbal (reading etc.) than math oriented but still ahead of most in K.