The Harry Potter bath bombs are a popular DIY and commercial product inspired by the Harry Potter series. They are typically made using ingredients such as baking soda, citric acid, Epsom salt, cornstarch, and various essential oils. The exact recipe and ingredients can vary, but some common components include baking soda, citric acid, Epsom salt, and essential oils such as almond, Brazilian orange, and cinnamon leaf oil. These bath bombs are often praised for their magical and enchanting qualities, as well as for leaving the skin feeling soft and fragrant. However, availability can be limited, and some products may sell out quickly due to high demand.