It's great that you think this way. I see too much of this pressure with my friends who have kids. They want to see them do math and read before they're x years old, with x being one or two less than what the cheaper schools are doing. My 3.5 says more elaborate sentences than the older kids, but never showed any special interest in math, and I never felt that he was ready to learn to read. It's completely normal for a 3.5 kid to not be ready to learn these things.