The Club Sandwich Family

According to The Washington Post,

"The traditional three-generation family has morphed into four generations: young children, active parents, active grandparents and frail, older relatives. Many children today can expect four grandparents to see them into adulthood. In this hierarchy, two strong middle generations are available to take care of the dependent generations at opposite ends of the life span. Instead of the sandwich generation, it's a club sandwich family."

Active young grandparents are playing a vital role in raising the children of their children:

"Increasingly, grandparents are stepping in as a solution to the normal stresses of raising a family when both parents work."