Watch The Pop Ups: Great Pretenders Club (2015) : Full Movie Online Free A collaboration between Brooklyn musicians Jason Rabinowitz and Jacob Stein, The Pop Ups have been setting the standard for children's music since 2010. The two-time GRAMMY Award nominees for Best Children's Album go on an adventure to become part of the Great Pretenders Club in this unique and imaginative rock and roll puppet musical featuring live action and animation.