Hello! My son is almost three, and I know what you mean when you say you want to help your son with the areas that were overlooked in your own childhood. I started looking for information on giftedness about a year ago, and found
www.hoagiesgifted.org and then Deborah Ruf's 5 Levels of Giftedness to be very helpful. SENG is an organization dedicated to "supporting the emotional needs of the gifted"
www.sengifted.org so you might want to check that out too. This forum is also a great place for ideas and resources. I read the preschool section from oldest to newest when I first found this place, and that was probably more educational than any book I could have bought.
As for "enough enrichment," I'd just follow his lead and go as deep into his favorite subjects as he wants to. Also, keeping safety in mind of course, you might not want to pay too close attention to the age limits on toys, but just find things you think he'd enjoy. This
link gives a good general overview of some signs of early giftedness (a milestone comparison chart) and some ideas for enrichment.
