@mmom- if your child is in preschool now, I would wait until Kindergarten.. if your child goes to public school they should have a Gifted program.. they will do the tests to see if he qualifies as Gifted- in my son's school they give IQ tests. They did warn me though before he took the test that Kindergartners don't have the life experiences required to score high on an IQ test, so if he didn't score high to get into the gifted program they would retest him again in 1st grade, but he scored high enough- just warning you in case your child doesn't score very high the first time he they are required to take an IQ test
