Crown Prince Frederik and Crown Princess Mary of Denmark, accompanied by their four children, attended opening of the LEGO House in Billund, Denmark on September 28th. Known as “Home of the Brick”, LEGO House is where the LEGO brick was invented. 

Here is the entire Crown Prince Family at the Lego House. Frederik being Frederik with a different suit and Josie b… twitter.com/i/web/status/9…

—
Tesouras&Tiaras (@TesourasTiaras) September 28, 2017

Danish Crown Prince Family attended opening of the LEGO House in Billund, Denmark. https://t.co/YVNZj099cD

—
Royal Highness (@vaninaswchindt) September 28, 2017

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#NEW (September 28th)♡||Crown Prince Family of Denmark yesterday attended the opening of Lego house in Denmark!!The kids are so cute!!!💛💛💛||♡ . . . #crownprincessmary #crownprincefrederik #princechristian #princessisabella #princevincent #princessjosephine #danishroyalfamily #danishroyals #denmark #royals #royalfamilies #royalfamily #royal #royalchildren #royalty #mom #dad #daughter #son #love #family #beauty #beautiful #video

A post shared by 👑European Royals!👑 (@royalty_europe) on Sep 29, 2017 at 8:41am PDT

Crown Prince Frederik, Crown Princess Mary were accompanied by Prince Christian, Prince Isabella, Prince Vincent, and Princess Josephine for their visit to LEGO House in Billund. It was the first official engagement for the twins, who helped their mother on stage after her speech.