My little boy is 4 months old!

My baby boy is going to be 4 months old tomorrow. I cannot even believe how fast time has gone by. He laughs and smiles all the time now. He is honestly the worlds happiest baby ever. He knows how to stick his pacifier in his mouth and he is now starting to try and put it in other mouths. He loves his toys and he looks so darned cute in overalls. Where time has gone I do not know, but I am trying so hard to enjoy every second while it lasts.