The twins celebrated their half birthdays last weekend. In L's words: "It's not our real birthday. It's just a holiday that Mommy made up". I didn't invite any other kids in fear that their parents would think that celebrating a half-birthday was a little too self-indulgent, so we just kept the day low-key and fun. Childhood goes by so quickly - why not take the time to celebrate all the little milestones? Here's how our "party" went...