Instructables user SoapyHollow writes:

Bath melts are fruit or nut butter melts for soaking in the tub. The added ingredients will leave your skin soft, detoxified and smelling terrific. This particular batch I made for valentine’s presents, hence the chocolate scent and red foil wrap. You can scent them with any essential oil or fragrance, and do them in any mold, even an ice cube tray. This is a kid safe project (as you can see by my assistant Igor), and the results are kid safe. And what parent doesn’t love things that will get your kids in the tub?