This is a great game that I saw in a recent Family Fun magazine. I just drew upper and lowercase letters randomly all over our driveway.
I would then call out a letter and Bekah would have to run to the lowercase (or baby) letter while I would run to the uppercase (or Mommy) letter.
Bekah LOVED this game and would have played much longer if it wasn't so hot outside. She was so bummed out when it rained and washed our letters away!