Many training programs have aimed to improve creative thinking abilities in various settings. The study of relevant literature revealed a relatively lower number of creativity programs for children than those developed for adults. The current work introduces a new and comprehensive nine-week long creativity intervention program implemented (out of school-setting) in 8- to 11-year-old children of socioeconomically disadvantaged families in Turkey. The intervention program was organized around four main themes (Persona, Object, Surrounding, Experience) and composed of nine activities: collection making, identity box, building a memory-device, designing an object, sensory mapping, designing a space, visual storytelling, exploring an imaginary planet, and solving a social conflict. Children (n = 159) were randomly assigned to experimental and control groups, and they took the Torrance Tests of Creative Thinking both before and after the intervention. Results showed that children in the experimental group had significantly higher verbal fluency and originality scores at the posttest compared to the control group. These results provide further evidence for the trainability of creativity and introduce a novel, affordable creativity intervention program that is feasible enough to be implemented in and out of the school setting.