Happy Birthday, Thing Two!!
You came into our lives as an expected surprise, and in the four years you've been around, things have been even more exciting than ever before. We love you more and more with each passing day.... Even if you try to send me to the insane asylum and daddy to the hospital because you've caused his blood pressure to rise too high. :-)
Your firey Independence is amazing, and when you're old enough, it will launch you to the stars!
I love you. Happy Birthday!