Instructions
Search for a plant that's infested with aphids, and break off a portion. You want draw ladybugs for you to breed, and nothing is more irresistible to ladybugs than aphids.
Find a plastic box with a lid and some screened airholes.
Soak a cotton ball in water, and deposit it with the portion of aphid-infested plant in the box.
Collect ladybugs in the wild and put them in the box. Add more aphid-infested plants for food as well as water-soaked cotton balls as needed.
Purchase ladybugs, should you not wish to breed ones you have collected. Make sure they have plenty of food and water.