You may find him standing in the crib. Baby will have good control grasping objects, and transferring objects from one hand to another. Baby may be afraid of strangers and will have a harder time separating from you. What babies at this age hate most is to be left alone. Stay away for 1-2 minutes and then take baby out of playpen.
Home safety becomes more important now.
Lower the crib to the lowest position. Keep side rail up at all times. Protect open stairs with gates. Lock up all medicine. Remove cleaning products.