Just to warn you, another long post!
Weight, Height and Sizes: As I said in Noah's post, we only got Jackson's weight at his last appointment. He weighed in at 11 lbs 2 oz, still one pound behind his brother. He is wearing only 3 month clothes and they fit him well, some things are a little baggy on him, like sleepers. Diapers are a size 1 and they also fit him well.
Eating: 5 ounces of Enfamil AR formula. This formula is for spit-up. It has added rice starch in it to make it thicker, and has helped with his spit-up. In the beginning, like 2 weeks old, he would spit up what seemed like an entire ounce. Now he still spits up some but it is not nearly that much and is very manageable. He also eats roughly every 3-4 hours and tends to eat more at night before bedtime.
Sleeping: Not quite through the night yet. For a few nights he has slept from about 7/8pm until about 4-5am. Which is still pretty good and we can't complain! At bedtime he doesn't do as well as Noah does at putting himself to sleep. I typically will rock him a little until he is sleepy then lay him down. He will cry maybe once (& have to be calmed down) before finally staying asleep. He does not have any specific nap times either and is also staying awake for longer periods during the day. He is also still sleeping in our room at night in his own Rock'n Play Sleeper.

Language/Personality: Jackson also talks a lot, actually more than his brother. He has a lot to say and will definitely be a talker like his Daddy and Sissy. Lately when he wakes up at 4am he is talking and cooing and a happy boy, I'm always afraid he'll wake up Noah he is so loud! He's also always happy. He smiles almost any time he is awake and definitely any time you are talking to him. I absolutely LOVE his big ol' gumless grin! The only time he is upset is typically when he is hungry, and it'll spring up on you too and come out of no where. He is always moving and very "stiff" I guess you can say. He doesn't cuddle as much as Noah does and when I hold him he throws his head back like he wants to see me, not cuddle with me. I say that's why he isn't catching up in weight with Noah, because he doesn't stay still.
Memories/Firsts:
1. Jackson laughed for the first time. He had been squealing and not quite getting the full giggle out but he finally did and it was so cute of course! He will also just be laying with himself and laugh at nothing =)
2. He is SO ticklish. That's one way to get him to squeal and laugh. Right under his arms on his sides and if you kiss/tickle his neck.
3. He rolled over from his stomach to his back! He hates tummy time lately but I have been forcing it on them to build those neck muscles. He's not a fan of building any muscles.
4. Jackson also has his hands in his mouth all the time and drools a lot also.
5. He loves his sissy. So does Noah actually. She loves on them all the time and can get them both to smile often.
6. He had his first boo-boo (technically day one into his 4th month but I'll forget to post it next month). It was at Haylee's birthday party and his head hit a door. I had never heard him cry like he did that day, it was heart breaking =(
Ahhh I LOVE that smile!
Typical, Jackson talking and Noah sad HAHA