This case involves a number of children who were exposed to lead based paint during their time living in an apartment complex, all of whom have subsequently suffered from developmental problems. The apartment had undergone several coatings of lead based paint other the years and all of the affected children lived in the same building over a certain period of their life. They all suffered injuries including permanent brain damage resulting in learning and mental disabilities. All of the children were exposed to deteriorating lead based paint during their residence. They were all approximately 4-5 years old when they were first exposed, with blood testing providing confirmation of elevated lead levels. The plaintiffs alleged that the defendants were substantial contributors to the elevated blood lead levels, lead poisoning, and resulting injury of the children.