Bath bombs, for the unfamiliar, are chalky feeling balls about the size of a small orange that you throw into a bath tub. They don't explode but they do react with the water fizzing and spinning, filling the water with fragrance and moisturizers. Bath bombs are a project ripe for DIYing, they often run $6 or higher at stores. SoapyHollow, a contributor at the DIYer blog Instructables has a top rated guide on how to create your own bath bombs. The ingredients are all cheap and readily available in most locales: corn starch, essential oil, vegetable oil, and so on. The most difficult component to find casually browsing your local market is the citric acid, ask if they have "sour salt" the common name for powdered citric acid. If you're looking for a side project to go with your bath bombs, make a matching scented candle or set up a bathroom spa on the cheap. How To: Make Bath Bombs [Instructables]
