31 PJ Masks Coloring Pages For Kids. PJ Masks is a British / French animated children’s television series produced by Entertainment One, Frog Box, and TeamTO. The series is based on the book series Les Pajamasques by Romuald Racioppo. The series debuted at Disney Junior in the United States on September 18, 2015. The series has been updated for its second season consisting of 26 episodes, which are scheduled to air in 2018.