 Between 1928 and 1932, Flores started and ran the "Yo-yo Manufacturing Company" in Santa Barbara before selling the company and trademark to Duncan who continued to market and sell Flores yo-yos alongside the Duncan line.Flores initially made yo-yos for neighborhood children by hand, but soon started buying machinery to produce them more quickly.Approximately a year after Flores opened his yo-yo business, his company was selling 300,000 yo-yos annually.