Lowell Robinson's "Hippie Brain Explosion" could only have been made in San Francisco...it's a blend of acid-trip visuals and tech-nerd inventiveness. Billed as both an "experimental drawing tool" (its practical purpose) and a "meditative toy" (its emotional function), "Hippie Brain Explosion allows you to create images that look like fractals...or tie-dye...well, both. Far out.