John Travolta (as Charlie), Robin Williams (as Dan), Kelly Preston (as Vicki), Conner Rayburn (as Zach), Ella Bleu Travolta (as Emily), Lori Loughlin...
Charlie and Dan are two best friends and co-workers. They apparently have no clue about the importance of family and what life is truly about. Dan's ex-wife, Vicki shows up after a long period of time and announces she and Dan have seven-year-old twins: a son and a daughter.
Now Dan recruits Charlie and together they have to take care of the twins and a dog. With help from a co-worker, Ralph, they go from outdoor activities with the kids and a rough instructor, Yancy Devlin, to enduring a flamboyant children's entertainer, Jimmy Lunchbox, and eventually they will learn the true meaning of life and family.