4 months! What milestones have your babies reached?

I can't believe he is 4 months already! He is sitting now almost on his own. Loves to stand up holding onto hands, he says mama all the time, he has started laughing, always is smiling, teething like crazy, loves his 5 doggies, pushes buttons and pulls levers on toys, chews on teethers using both hands, likes to happily scream, touches his toes, rolls back to belly and belly to back, drooling is at an all time high, we went to the park for the first time, he is trying to kiss back, grabs everything!!! and loves to nurse! My sweet baby Brantley!