In the Army Now

All of my kids have hit the physical milestones early - they all rolled over at 2 months the first time and consistently by 3 months. The boys both crawled at 6 months. Caden walked at 9 months (fully) and Lincoln at 11. But there is something bizarre about this girl of mine - she will be 4 months tomorrow and she is doing the army crawl! How is this even possible?! She's my last baby and she seems determined not to be any more of a baby than she has to be. Why, oh why can't they just stay little? Sigh.