Meet parents who have splashed out $70k on a five-month cruise around the world for their entire family.br br Mark Baker, 40, and his wife, Tiffany, 39, decided to pull their daughters - Giuletta, 10, Penelope, eight, and Delia, seven - out of school and embark on the adventure of a lifetime.br br The cruise ship will call at 52 ports in 21 countries - including South Africa, Madagascar and Argentina - across five different continents.br br The pair are homeschooling their children and working remotely while they are onboard the ship - which set off from Marseilles, France, on January 6.