DS is just newly 3 (born July 1st and school cut off is 9/1,) but I am already thinking that he won't be ready for kinder in 2 years. I know redshirting can be a controversial topic, but it's not to get any kind of "leg up" and I would LOVE to not pay for 3 more years of pre-k, but DS is extremely speech delayed (he goes to therapy and is making great progress) and is immature for his age. I just don't want to put him into an environment sensing/anticipating that he is going to struggle. I am hoping he will be ready in 2 years, but am not holding my breath.
Anyway, when/how did you *know*? Any other insights?