In searching for bath products for my babies I try to use all-natural products. Specifically I try to stay away from products containing PEG-80, which is becoming a concern to a lot of parents. Bubble baths, in particular, are difficult to find sans this compound.
California baby products do not contain PEG-80, so I purchased their bubble bath. They have several varieties available. I purchased the Calming Bubble Bath.
It smells wonderful, and produces a lot of bubbles (although not as many as I've seen other bubble baths produce). I am not certain whether the 'calming' formulation actually calmed my two-year old down, but she really liked playing with the bubbles. It comes with a bubble wand, so you can blow bubbles at your baby, which they enjoy.
By the end of a normal length bath, most of the bubbles are gone, which is nice because you don't have ot work at rinsing your child off after their bath.
I feel good about recommending this product. It makes bathtime enjoyable for you and your child, and is a safer option than many out there. It is a little more expensive than other bubble baths, but in my opinion it's worth it.