Mainly go for walks. Walks down the street, playing with your shadow. Walks down the street, to watch cars park. Walks down the street, remember there is a park at the end, and go to play there too. Walks away from the park in the opposite direction from home on a big exploratory adventure.
The baby likes to walk. This I am not discouraging.
Thus far not that impressed with this life beginning at 40 malarky. Seems to involve getting no sleep, nursing sick child and missing out on mother's birthday etc. If life post 40 continues in the vein in which life at 40 began, please tell it I'm not so interested.