Princess Charlotte has 'terrible twos' moment on royal tour

She may be a royal but even princesses have their moments. 

The Duke and Duchess of Cambridge and their two children yesterday visited the Airbus compound in Hamburg, where the helicopters are estimated at almost $20 million, on the last day of their royal tour.

But Princess Charlotte appeared a little more hesitant to peek inside the helicopters than her older brother, who turns four today.

Despite her parents words of encouragement, the two-year-old threw herself to the ground in protest at one point. 

Luckily, after her mother Duchess of Cambridge picked her up, her mood seemed to quickly subside and moments later she was skipping happily along the tarmac.

The visit gave Prince William, who flies the H145 at the Air Ambulance, a chance to show off his skills in front of his young family. He was seen showing his son how to open and close the door and putting a helmet on him. 

Charlotte's 'terrible twos' moment comes at the end of a grueling week for the children, who have accompanied their parents on a royal tour for the first time.

The five-day tour has included a packed schedule around Germany and Poland.

The family, who were colour co-ordinated in shades of red and purple, were farewelled by British ambassador Sir Sebastian Wood and the mayor of Hamburg Olaf Schulz.