1. Put on a coast guard approved vest!!!! I just took my 6 month old daughter out and I usually ride with a non-approved, but if something happened I want all the flotation I could get for both of us. She is 15 lbs and just holding her up dunked my head under.
I would not put a second set of bindings between yours. Talk to wakejunky and get a small piece of gator grip and put between your feet for traction when he gets older. Email him that pic and I bet he will send you a scrap for free
His name is Chris Foye [firstname.lastname@example.org]
My 6 month old was very good when I rode with her, she even smiled for a second. We only rode for about 3 minutes at about 15 mph. My wife took about 100 pictures and each one I was smiling ear to ear, my cheeks actually hurt when I got in the boat. Can't wait till she gets older, my wife wants her to breaks parks record, but I am in no hurry