Boric Acid == Borax. The laundry detergent is exactly the same thing, and it costs a fraction of the price too.
20-Mule Team Borax detergent is 100% Borax (the mineral). You can use it for all sorts of things from a pesticide to washing clothes to cleaning the bathtub to a deodorizer like baking soda. And the best part about it is that while it kills things like roaches, ants, and fleas -- it's less harmful to your kids than table salt. You could even use it for diaper rash if you for some reason felt so inclined. And even some... feminine problems. Something about sticking something that's also a pesticide up there is a bit weird -- but it's what they used to do.