Kate Middleton and husband Prince William are doting parents to three adorable children; Prince George, Princess Charlotte and Prince Louis.The family are known for their love of the outdoors, and thrifty young royal Kate is always encouraging the kids to play outdoors and make the most of nature, rather than staying indoors watching television.The 39-year-old Duchess takes the same approach when it comes to their family holidays, preferring to keep things low-key and purse-friendly, despite