Teach him high five, it’s pretty easy and super cute. Also, if you haven’t already, get a harness and start training him for that so you can take walks together safely. Hiding treats is a great activity, it helps satisfy the hunting urge. You can even do this with regular food, hide small amounts in various changing locations around your space, so he has to go hunting.
Another great choice is The King Henry Tapes by Richard Raley. It’s a take on HP, but the magical kid from a dysfunctional family is a juvenile delinquent with a foul mouth. One of my favorite series.