I have a fantastic 4 month old DS. He's a cheery boy, usually wakes up cooing and smiling, easy temper, cries when he wants specific things but stops when he gets them. Until the last week or so. He wakes crying, he cries when I lie him down, he smacks my hands away from the bottle and thrashes when feeding, he stares around the living room with anger! He doesn't like to be held by me or cuddled in a lying down position. He seems frustrated. There's nothing physically wrong, he's not ill and he's feeding well when he eventually eats! I'm aware that 4 months is a big period for mental development and I think he's just upset with the world right now. He can't sit unaided, I got him a playnest which props him up enough to play himself. He's able to grasp things for a short while and can push buttons on some toys. He wants to chew everything of course but can't seem to hold them in his mouth. He can roll on the sofa but not on the floor yet. What's the best ways to play with and occupy him? What can give him the independence he seems to want, my SiL has a Jumperoo and a mamas and papas seat that he seems to like. I know that he's probably going to have his cross stage regardless but I want to at least try to make him happier! How do you adjust to having to consider mental reasons for crying as well as physical?! has anyone any experience of personality changes at this age? Its very hard to make him smile at the moment and he was laughing all day!