Hi Brittany - As for a book about identifying giftedness, I liked Ruf's Losing Our Minds: gifted children left behind. Losing Our Minds

For those kids who exhibit their GT very early, this is an interesting read. I liked the stories from parents of GT kids - it made me say "that's our son!" and helped us feel like we weren't imagining things.

And I concur with the others about just giving your kids the tools to play - blocks and setting up train tracks and legos (now we're on the "all legos/all the time" station) have always been hits with our DS, now 4. I would get him things I would think he would like, even though they were for older kids. We did the zoo a lot when he was young, too. We also found good friends in Early Childhood Family Education classes. They had loads of ideas for activities too.