DS is 5 months old and trying desperately to get himself mobile. I know he'll require more supervision once crawling but hoping he'll be happier once he does! He seems to just get bored and frustrated at the moment when he can't do what he's trying so hard to do. I have to keep changing him into new positions when he's playing - front, back, sitting etc. to keep him happy and occupied with toys.
Did you notice a change in your baby once they became mobile?