Around this time, we started the weaning process and he was also sitting comfortably. We would put him in front of the shelf and let him play. There were usually two to three items in the cubbies. A treasure basket and another one or two items. The red ball stayed on top of the shelf.
Once my son started slithering, he would find his way out of his room and try to find us. He started spending more time in the living room and so we set up another shelf for him in the living room.