and for the calmer types, there's:
- liquid methane/nitrogen/oxygen/hydrogen/helium bath bomb (makes the water chilly but not as chilly as the real liquid cryogenic gases, and ofc makes it look like them)
- fake radiation bath bomb (glows green but doesn't give you extra limbs or anything)
- oil bath bomb (turns the water as close as possible to oil in appearance)
- blood color bath bomb (simple red color change)