Take a deep breath! Go for a girlsd night out!!!!!
Now.... I feel the same way a lot! I have a 9.5, 5.5, 4 andf 2 y/o. #1 was " brilliant"- after that I think we have learned our colors from which Wiggle is which, music and art from Baby Einstein and Counting from Elmo!
Seriously- my mom is a preschool teacher and she was saying that little ones learn like sponges- if we just give them a full enviroment- not a home class room. I do a lot of talking- "We will put on the red dress" "Arms go up, diaper comes off" We do read a little- one great book is called "Before Five in a Row"- it gives you some classic Preschool books and ideas on how to point different things out to kids about the books. The idea is to read the same story 5 days in a row. I'll go for walks and call it a "cat day" or "blue day" and we just point out the different things that match the day.
I give myself permission to not be "on"- to let the kids just play with Play Doh while I make dinner or to play w/ leggos on theier own. I think kids really need to learn to entertain themselves.
When all else fails, until the end of September, there is the Lake Highlands Splash park- which is free and alsmnost empty at noon- we eat lunch and go RUN so they take a good nap- and so do I :-)