Jimmy Fallon is thinking about what tasks President-elect Donald Trump designated to his son Eric Trump while his eldest, Donald Trump Jr., was in Greenland.

“Today, Donald Trump Jr. visited Greenland right after his father talked about buying the island,” the “Tonight Show” host said Tuesday. “Yep, Don Jr. is visiting Greenland while Eric is on a recon trip to Legoland.”

“‘I’m building that wall, Dad! One brick at a time!’” he added.

Donald Trump Jr. visited the Danish autonomous territory after the president-elect’s repeated musings about purchasing it. Donald Trump suggested at a press conference on Tuesday he would not rule out using military force to take control of the island.

Danish and Greenlandic officials have said the territory is not for sale.

Watch Fallon’s monologue below.