Kimberly - I think everyone's given great advice already (and kickball, i really like that "whatever you think they can do, take it times ten"). But I'll add my two cents, anyway.

I see you are having concerns about the flashcards/appropriate materials for a 2-year-old. Since DS4 is my first, I had no ideas what was appropriate, and I just got things I thought he'd like. So we did have some alphabet/word flash cards when he was around 2. They had blue from blues clues on them, and he liked blue then. So, like others here, I think that if you're child is asking for something, it can't be hothousing.
Have fun!