El tercer xampinyó

Famous scientist Melvin Sagarsky has returned to the home of his granddaughter Ellie determined to shake the placid and calm life of the whole family. Because Melvin is not a grandfather like the others. A year ago he discovered a formula for rejuvenating the body that he tried first of all in himself, and now he goes around the world with the appearance of a fourteen-year-old boy, although when he opens his mouth, it is clear that he's still an old maniac and mischievous.