He should have appropriate neck support. If he lies on his tummy, he should be able to raise his head and upper trunk. By now his hands are not always forming a fist and by 4 months, he should stop fisting. For a fleeting period during this time, he will discover he has hands and will look at them before using them (hand regard). He should now be playing with his hands and bringing them to the midline. He will hold a rattle placed on his hands. He can follow an object with his eyes through a range of 180 degrees. He now laughs and squeals and is aware that smile attracts attention. He makes noises on social contact and turns to sounds at the same level.