Seth: On Walls collects the colorful, visual universe of a globe-trotting street artist who paints with purpose.   For street artist Seth, walls around the world have been canvases for resilience, a space where imagination and real-life encounters become murals of expression, dialogue, and community. Children are often a part of his work, taking him—and us—through city streets on a poetic discovery of their universe, like the rabbit hole into which Lewis Carroll’s Alice plung