Cooper, you are 4 months old!You weigh 13 pounds (9%) and are 25 inches long (50%). You're a skinny little guy, but you are healthy and growing, so I'm sure it's just a matter of time before some little fat rolls show up on your legs. You are still in a size 2 diaper, and still nursing exclusively. We may try some cereal this month, but we may hold off for a while. You don't seem to be super hungry, so I think you will be fine without it for a while. You're not sleeping very well these days. Your naps are about 1-1 1/2 hours long, and you're waking up every 2-3 hours at night. To say I'm tired is a big understatement, but that's okay! Hopefully you're just going through a growth spurt. I finally moved you to your room at night. You were getting way too big for the co-sleeper, so I knew it was time. Maybe you're just adjusting to being in a different room. You are still such a happy boy! And SO busy. You literally never stop moving. Everyone that holds you asks us, "Does he ever stay still?" You're our little Wiggle Worm. :)You are so ticklish. W can always get you laughing by ticklng your ribs, or playing peek-a-boo with you. You roll over in both directions now, so I know it will just be a matter of time before you are moving around everywhere. You want to see what Jackson is doing all of the time. And Jackson is just crazy about you! He is so good with you, and loves to give you hugs, or get you a toy to play with. I know you two will be such good friends. We love you, baby boy!