Before their Phoenix Theater show, Taylor Hanson (with bull horn) of the band Hanson takes about 350 fans on a walk through Petaluma Wednesday to raise money for charities in Africa. The band, made up of brothers Taylor, Zac and Isaac and best known for their ’90s hit “MMMBop,” asks fans to join them for a 1-mile barefoot walk before each concert to represent what a typical African child goes through on a daily basis.