After Angelo's death in 1899, his son, Anthony carried on the family business and in 1923 brought his nephew, Felix Grucci, to serve as an apprentice. Competition was strong, but the firework market weak. Early in the Depression, they moved their business to Miami, Florida in hope of greener pastures. But, homesick, and at the urging of the family, they returned to Bellport in 1929 to continue there business.

The Depression Years were tough on the fledgling entrepreneurs. Felix, to make ends meet, worked many nights as a drummer with a local band. There he met Concetta DiDio and they were married February 4, 1940. They raised three children: James, Donna and Felix Jr. All three children entered the family business.

Over the next three decades, Felix Grucci gained a reputation as a master of his art. He invented the stringless shell, a landmark innovation that eliminated burning fallout. The firework industries greatest safety problem. Developed for the Defense Department, an atomic device simulator for troop training during exercises. Demand for firework displays, other than traditional 4th of July displays declined during the 1960's further culling the firework industry. Only the best prevailed. Their genuine friendly mannerisms and professional approach won them many loyal clients, so they prospered.

Felix continued to build his business with the help of his wife, Concetta, and son, Jimmy, into a regional clientele including New Jersey and Connecticut during the late 1960's. The nation's bicentennial celebration in 1976 was a banner year for the fireworks industry. The Grucci's received rave reviews for their first major performance out of the New York tri-state area, for the nation's 1976 bicentennial celebration with fireworks on the Charles River for Arthur Fielder's Boston Pops.

However, every entertainer has a debut to national stardom, and in 1979, the Grucci's was incredibly etched in fireworks history. The Grucci's became the first American family to win the Gold Medal for the United States at the annual Monte Carlo International Fireworks Competition. This is the super bowl, the Olympics of all fireworks competitions. Beating other competitors from Denmark, France, Italy and Spain. The Grucci's consider this one of their greatest accomplishments, and the New York press dubbed them as America's First Family of Fireworks.

Monte Carlo was the Grucci launching pad, but Olympics debuts at Lake Placid, Los Angeles and most recently Salt Lake City, Utah, consecutive world fairs at Knoxville, New Orleans, and Taejon Korea. Centennials for the Brooklyn Bridge and the Statue of Liberty and 6 consecutive inaugurations of Ronald Reagan, George H. W. Bush, William Clinton and George W. Bush affirmed them as master artists of their trade.

Today, Concetta Grucci continues to oversee the activities of the family business. Felix Jr., was elected to serve as a United States Congressman in 2001 advancing his sister Donna to President. Jim's son Phil, the 5th generation is now the Executive Vice President and Donna's husband Philip is Senior Vice President of Sales and Event Marketing.