If you don’t have duct tape some very strong glue will do.
Also, I would install a rocket-type thrust device in the skateboard to boost the dog’s learning progress. And a parachute if he takes a wrong turn on that mountain.
So far, I can’t even get her to stand or sit on the skateboard for long. I pick her up and sit her on it, and give her treats, but then when it moves she jumps right off!
the ducttape joke is kinda getting old, are you using an old school board? (only back has concave) it seems like that might be easier so the dog coulod go to the front if he wanted to. Also, mabye make it comfortable on it some how so he wants to stay on. or dont feed hom for a while the put food on the board so he gets on then push it. (kidding of course)
Dogs that are on fire seem to skateboard really well. Douse your dog with a slow burning lighter fluid. Put the dog on the skateboard and ignite it. If it doesn’t work the first time, just keep trying. Ignore the smell, dogs put out an acrid odor when they are frustrated.