Bubble scoops are a new favorite of mine! They make loads of lasting bubbles and instead of drying your skin out like normal bubble bath mine leave you moisturized! Made with gentle ingredients, one scoop is good for 2-3 baths!
Normal bubble bath( and LOTS of other commercially produced products) is made with something called SLS (sodium lauryl sulfate), it's a cheap detergent and surfucant(foaming agent). Its found it a wide variety of skin products along with things like engine degreaser and industrial cleaners. Its known to irritate skin along with other issues.
I use something called SLSA ( Sodium Lauryl Sulphoacetate) While its name is similar to SLS it is VERY different. SLSA is derived from coconut and palm oils and is classified as skin safe and a good alternative for people with sensitive skin. It is however much more expensive then SLS which is why you don't see it used as often.