Need some ideas on where to take the family for vacation?  iVillage has compiled a list of 40 Must-See Places to Take Your Kids Before They’re Grown. And to give you an idea of the best age to take your children to the suggested spots, they provide an age guide, divided from toddlers/preschoolers, grade schoolers, tweens, to teens.  Included are the obvious places like our national parks (a must for any age!) and theme parks.  But there are some ideas you might not have considered, such as taking your teen to the Galapagos Islands or your grade schoolers to Buckingham Palace to see the changing of the guard. Take a look at the list and start planning, but hurry; the kids will be grown before you know it!