On any normal day of the year, the children of super-rich parents holiday on super yachts, try out jet-powered surfboards and give away birthday goodie bags worth thousands. So what on earth can these lucky youngsters expect at Christmas? This seasonal special - following on from a two-part documentary last January - reveals the most extravagant presents money can buy. They include the fashion designer who pays for a professional pantomime company to perform in her home, the country mansion where Santa arrives by helicopter, the rocking horses that cost more than the real thing, the 24-carat-gold BMX bike and the colouring book setting its buyer back a cool £24,000