HAMILTON, NEW ZEALAND - APRIL 12:  Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge are presented with a Avanti mini bike for Prince George during a visit to the Avanti Drome on April 12, 2014 in Hamilton, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge.  (Photo by Chris Jackson/Getty Images)