In my humble, but reasonably well informed opinion, less is more. Just sit back, commentate what you do, what she does, explore and enjoy the world together and follow her lead. I wish I'd done this more with DD. I was so anxious to fill every minute with things that stimulated her as she too was a very aware baby. It kind of blew up in my face though, as she came to assume that she couldn't find her own fun and was very dependent on me for input and structure.

Then I found this wise woman http://www.janetlansbury.com/tag/play/ and have followed these ideas more (certainly not to the letter, but it's been my general guide) with DS. He is just as physically, verbally and cognitively capable as DD was, but the difference has been that both he and I are more relaxed and confident. He is a very content, aware, curious, independent little guy, and while I'm sure his temperament comes into play, I feel sure that it's also because he has consistently received the message: you are enough. He doesn't have to do more or learn more or achieve anything. He can just explore and learn and play at his own pace and anything that takes his interest is a worthy learning opportunity. At 16 months he has at least 100 single words and is starting to use adjectives and two-word phrases. He runs and climbs, feeds himself well, stacks blocks... meets all 'milestones' beautifully. And he didn't need anything but basic toys and our wild and wonderful garden to explore to get him there.