Aiden is getting rather proficient at walking around, and can even “run” to a degree. We play this game where I get on my hands and knees and chase him around making a quacking sound. He used to hold on to Tanya’s finger and run around, but now he can do it on his own. I’ll hide around a corner or behind a couch, and he’ll walk around very cautiously, knowing I’m hiding somewhere. Then I’ll pop out quacking, and he’ll squeak and take off running. It’s hilarious. 
He even knows when I stop and turn around to start chasing me back!