It's disappointing to realize I’m not youthful enough anymore to envy older people! That’s the situation facing the adolescent “Josh” (David Moscow), who simply wants to finish with school and all the awkwardness of puberty. A peculiar-looking slot machine named "Zoltar" offers him a wish in exchange for a quarter. Naturally, he dismisses it as foolishness when he goes to bed, but upon waking up the next morning, things have definitely changed—his clothes don’t fit, and his mother is shocked to discover that Tom Hanks seems to be living with them! What the boy didn't request was an adult mindset to accompany his new body, so feeling it’s safer to leave home for a while, he has to figure out how to support himself. Fortunately, he finds employment—and what better place than at a toy company? His thirteen-year-old perspective makes him uniquely suited to help test their new products, and he quickly gains the attention of his boss “MacMillan” (Robert Loggia). MacMillan is impressed by the energy and ideas of his new employee, so grown-up “Josh” soon finds himself in an apartment with all the modern conveniences his younger self would desire. His ascent isn't universally welcomed; disgruntled executive "Paul" (John Heard) isn’t pleased, but fellow colleague “Susan” (Elizabeth Perkins) is drawn to his fresh outlook and to him personally. Now, predictably, his adult self develops feelings for her as well, but emotionally—well, you’ll have to see… Hanks delivers a wonderful performance, portraying the perfect childlike viewpoint. He's apprehensive, worried, innocent, excited, and the immaturity of young “Josh,” placed in frequently inappropriate situations, is often quite entertaining. The bickering with Heard also works well, and the romantic aspects brought back those first crush feelings in a way that felt incredibly accurate. It’s a good reminder that life feels most vibrant when you're young and carefree. The conclusion is fairly obvious, and I found it somewhat sad—but I suppose it was necessary!

Source on TMDB