KoKo the Clown was created by Max Fleischer in 1919 and became successful in 1921 when Fleischer Studios was founded. Koko was created using Rotoscoping, a technique developed by Fleischer that traces animation cels over filmed action for smoother movement. Humorous Phases of Funny Faces, created in 1906, is considered the first animated film featuring cut-out animation of drawn faces on a chalkboard coming to life. Gertie the Dinosaur, made in 1914, was an early animated film created by Winsor McCay that featured a dinosaur and was number 6 of the top 50 greatest cartoons.