One of the most incredible pieces of musical theater ever created. It has been running on Broadway for almost 20 years, but still definitely worth seeing if you never have. It is full of life-changing musical numbers (some of the best songs aren't even in the movie!), incredible direction and staging, and a really good time even (and especially) for adults!
Pro tip: get an orchestra aisle seat or the magical opening number (Circle of Life, duh).