Modern Jazz & Soul Fest6-11 p.m. Friday, April 11 and Saturday, April 12, Roots Music Project, 4747 Pearl St. Suite V3A, Boulder. Tickets: bit.ly/JazzSoulBWThorne Spring Fest 202510 a.m. to noon Saturday, April 12, Lafayette Nature Center, 300 Old Laramie Trail E. FreeIs it safe to say spring is finally here? Join the team of nature educators for their first Spring Fest at the new Lafayette Nature Center. Learn to Knit10:30 a.m. to 1 p.m. Saturday, April 12, pARTiculars Art Gallery and Teaching Studio, 401 S. Public Road, Lafayette. Botanical Plant Ink Workshop11 a.m. to 1 p.m. Sunday, April 13, The New Local Annex, 713 Pearl St., Boulder.