A mobile children’s museum will soon move its trains, paint and puppets out of a trailer and into a permanent space in Hillsboro. The FLIP Museum, which was founded in 2021, currently brings mobile exhibits like a fake food cart, a magnet wall and a wind tunnel to meet children throughout Washington County. But next year, the Beaverton-based nonprofit will open an interactive space in The Terrace Plaza building on Southeast Third Avenue in downtown Hillsboro.