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Prince George cheers up while playing on a helicopter during royal tour

Prince George was finally smiling and Princess Charlotte was throwing a tantrum as the royal family wrapped up its goodwill trip in Germany.
/ Source: TODAY

It took nearly their entire five-day goodwill trip through Poland and Germany, but the Duke and Duchess of Cambridge finally found the cure for agrumpy Prince George on Friday.

Awesome helicopters!

Prince George clearly feels that hanging out in a helicopter is a lot more fun than shaking adults' hands all day. GC Images

George, who turns 4 on Saturday, beamed during the family's tour of the H145 and H135 helicopters at an Airbus factory in Hamburg, Germany, on the final day of the royal family's goodwill trip.

Unfortunately, just as George came out of his funk on Friday, 2-year-old Princess Charlotte had a tough day as she took a tumble on the tarmac and threw a tantrum that Duchess Kate had to defuse.

Princess Charlotte didn't have quite as much fun checking out the helicopters after losing her footing on the tarmac. PATRIK STOLLARZ / AFP/Getty Images
Princess Charlotte was ready to head back home to Great Britain after a tough end to the trip on Friday. Chris Jackson / Getty Images

Making a 3-year-old boy crack a big smile is a lot easier when he's able to climb aboard a cool chopper just like the one his dad, Prince William, used to fly as a member of the East Anglian Air Ambulance crew.

The visit to an Airbus factory in Hamburg, Germany, culminated a five-day goodwill trip to Poland and Germany by the royal family this week. PATRIK STOLLARZ / AFP/Getty Images
Prince George sits in a rescue helicopter as he visits Airbus in Hamburg, Germany with his parents and sister.Jane Barlow / PA Images/Getty Images

It was a far cry from Wednesday, when a grumpy George got off the plane in Germany and was not in the mood to be shaking hands with various dignitaries.

Meanwhile, Charlotte stole the show on Wednesday by giving out official royal handshakes as she clutched a tiny bouquet of flowers.

Friday wrapped up the royal family's trip, which was part of a diplomatic gesture by the United Kingdom as the nation extricates itself from the European Union as a result from last year’s Brexit vote.

The trip marked the third royal tour for Prince George and the second for Princess Charlotte, who made her worldwide debut in Canada last September.

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Follow writer Scott Stump.