Oh happy day Calvin!! Your brothers are so happy for you to be 4 months old. ;-)
You and your daddy get to have little chats now that you're 4 months.
'yeah, I can hold my head up.'
'I roll over all the time now.'
'My brothers make me laugh'
'My fingers & toes really taste great'
My.little.buddy. 4 month old check up: 15 lbs 1 oz & 26 inches long!! I'm going to have to pack up your 3-6 month size clothes already & I could just cry! I'm so glad you are growing 'big&big' as James would say. Keep up the good work buddy - and if you can, please go back to sleeping through the night? This new skill of rolling over & all this growin' is really keeping you up at night apparently. But these days are going by fast enough already, so take your time buddy. ;-)