Author: Kelly Hessedal Updated: 10:37 PM EST January 7, 2021 SAN DIEGO — A San Diego family is celebrating a big milestone. Their quadruplets delivered at Sharp Mary Birch just turned five Thursday! News 8 first introduced viewers to the Ferraro quads and their parents back in 2016. Today they are happy, healthy and full of energy. The once tiny 4-pound babies have developed big personalities. Charlie, Claire, Henry and Dillon are now in preschool. They have their own Instagram page. "Challenging Charlie, Claire is the boss, Henry is laid back, and Dillon is very mature," said mom Katie Ferraro. "Kids are a lot of work, but they're a lot of fun," she added. "I'd like to say it was easier when they were younger, but I'm not sure these days.