You are now 4 months old. Definitely no longer a newborn, and you don't feel like an infant either. You are a baby, and a cute one at that! I'm now starting to carry you on my hip, and we are both getting used to that. You are getting pretty heavy and it is easier for me to carry you that way while I do other things. Since I am carrying you like that now, that means your head/neck is very strong now, which is great! You like to do a lot of exercise on your tummy, and have rolled over from your tummy to your back twice now, the first on January 21st, and the second time on the 28th. The first time you looked extremely surprised and weren't sure what had happened! It was pretty funny. Pretty soon you will be a pro at rolling over. You are also working on your sitting skills -- you can sit very well when propped up, and enjoy the view it gives you.
Love, your family