Photograph of HM The Queen leaning through an open window at Balmoral as she helps Princess Anne climb through the window. Standing on the ground is Prince Charles, aged almost 4 years, who helps his sister up through the window. After her birth in 1950, Princess Anne became Prince Charles’s principal playmate. This is from a sequence of photographs of Prince Charles playing with his sister and mother at Balmoral in 1952. The Prince climbs up the trellis and in through the window; Prince Charles stands tall on the windowsill; the 2 year old Princess Anne has a little trouble reaching the windowsill; Prince Charles comes to the rescue of his younger sibling. Balmoral Castle in the Scottish Highlands was built by Queen Victoria and Prince Albert as a family holiday home. It is still used by the Royal Family, particularly during the summer months.