Imagine telling your kid that for the big day, you’ve arranged to have on hand 51 horses, a lion, a giraffe, a deer and two dragon-pulled chariots. You can do just that if you throw a party at the Prospect Park Carousel. Parents can provide refreshments, call a caterer or opt for a food cart. Booking at least six weeks in advance is required. $375 for up to 60 kids and parents for private party; $175 during public hours.