Years ago when I was assisting on an advertising photo shoot I worked on a job for a bubble bath product. Three assistants were charged with creating a big bubbly bath without using anything other than what a typical home would have on hand in their bathroom and the suggested amount of the soapy product. I remember we were totally stymied and failed attempt after attempt to produce an impressively foamy bath. So we cheated and used a ton of the product and a garden nozzle.
My kids love bubble baths, and after what feels like a few hundred bubble baths, I think I figured out the trick to getting a lot of bubbles without using a lot of soap solution. Pour the bubble bath solution into the tub when there is very little water in the tub—about a half an inch of water or less. Agitate the water vigorously, and keep agitating while the tub fills. The soap to water ratio will be higher when there is less water in the tub so the time to make those bubbles is right at the beginning. Bubbles float so you can fill the tub as high as you want and still have an impressive amount of bubbles sitting on top of the water. The bubbles will burst after prolonged exposure to air, so start the bath when your child is ready to get in, not 10 minutes before.
Juliana Sohn is a photographer based in New York City.