He loves playing in the box of potatoes and carrots we have sitting in our kitchen. It is normal sight to see him gnawing on a potato or carrot with dirt smeared all over his face.
Our "office space" is also particularly fascinating with all the cords, boxes, paper and large objects. After feeling like it was futile to keep saying "NO" to him all the time, I tried putting chairs in front of the electronic stuff to keep him from gnawing on electrical cords. The only thing it did was slow him down as he managed to wiggle through between the back and the seat of the chair. He seemed to enjoy the challenge and was quite proud of himself when he made it back to those cords.
Really, he just likes to stand around now. He'll talk to himself, annoy the dog and walk between two chairs but I think he really is just happy to finally be upright, all on his own. He seems to have inherited the independent spirit of his parents. And my mother is laughing at me right now.