Dittoing the suggestion for the Parent's Guide to Gifted Children. It is a great resource.
My suggestion would be to avoid the computer and efforts to teach specific concepts like letters. There is quite a bit or research suggeting the most important things during the toddler and preschool years are to focus on having a wide variety of experiences. Some ideas: water and sand play, trips to the park, time in nature, pretend play - puppets, dolls, play kitchen, trucks, balls, wood blocks, etc. Look for toys that are open ended, don't have batteries. The work of the toy should be done by the child not the toy. Enjoy time together - songs, stories, fairy tales, nursery rhymes.
