Vice President Joe Biden wishes he were a kid again — saying he’d know how to take care of the schoolyard bully.

Speaking Friday at a campaign event for Hillary Clinton in Wilkes-Barre, Pa., Biden said of Donald Trump, “The press always asks me don’t I wish I were debating him. No, I wish we were in high school. I could take him behind the gym. That’s what I wish.”

Biden, 74, passed on a presidential run after son Beau died — and has enthusiastically supported Hillary Clinton.

Trump, 70, has previously called Biden stupid.

“Joe Biden is not a very smart guy,” Trump said in a July interview, accusing the veep of being “ill-prepared because he says so many things that are just absolutely wrong about me.”