I do have a few list of a great family vacation spot:
Orlando, Florida They have theme parks, Disney World, Universal Orlando. They have beaches where kids can play in the sand.
Or camping, There is a great camp ground in Townsend, Tennessee. Where you'll see mountains, forests, river, they also have a playground for kids, swimming pool, horseshoe pits, basketball court, bicycle rentals and many more.
Or Water parks, Coney Island in Cincinnati, Ohio. They have a swimming pool, diving boards, water slides, rides, family roller coaster, bumper boats, pedal boats, golf court and much more.