Jessica Gonzalez hustles behind her booth at a recent craft fair, frantically ringing up sales, answering questions and packaging her beeswax candles. It is hot on the grounds of the Los Angeles State Historic Park in April, but 35-year-old Gonzalez and her fiancé, Jordan Colindres, keep their cool as a crowd gathers to admire her collection of Happy Organics candles, which look like real fruits and vegetables and are a homage to her family’s produce company. Judging by the smiles and charmed...