Once your baby is a few months old, she will be able to sit up and enjoy her bath on a whole new level. Babies at this age delight in the sensations and sights of a bubble bath. Unfortunately, most commercially prepared bubble bath formulas use sodium laurel sulfates and petroleum byproducts. Who wants their baby soaking in that? A better bet is to make your own homemade bubble bath. It is so easy to make and use that you will wonder why you ever bought a commercial product.