BrainPop (stylized as BrainPOP) is a group of children's educational websites based in New York City. It hosts over 1,000 short animated movies for students in grades K–12 (ages 5 to 18), together with quizzes and related materials, covering the subjects of science, social studies, English, math, engineering and technology, health, arts and music. In 2022, Kirkbi A/S, the private investment and holding company that owns a controlling stake in Lego, acquired BrainPop. BrainPop is used in more than 25% of U.S. schools and also offers subscriptions for families and homeschoolers. It is also used in schools in several other countries, where it offers videos in local languages that are designed for students in those countries. The site is available by subscription but has some free content, including a movie of the day, several movies from each topic area, educators' materials, and games. Its content can also be accessed using its smartphone and tablet applications. Most of the videos feature the characters Tim and Moby. The videos and other materials are aligned to state education standards and designed to engage students and assist teachers and home schoolers. In addition to BrainPop.com for older children, the company offers BrainPop Jr. for younger children (grades K-3); BrainPop Español; BrainPop Français; BrainPop ELL for non-native speakers learning English; BrainPop Educators, a free site for teachers and parents to post materials like lesson plans, and interact with BrainPop and each other; GameUp, a library of educational games; and My BrainPop, a tool for students and teachers to record learning accomplishments. Description of the site Company history BrainPop was founded in 1999 by Avraham Kadar, M.D., an immunologist and pediatrician, to explain medical concepts to his young patients using animation. The BrainPop websites display animated, curriculum-based content that supports educators and are intended to be fun and motivational for students to watch. The sites' movies cover the subjects of science, social studies, English, mathematics, engineering & technology, health, and arts and music. The sites also access educational games. As of 2022, BrainPop is used in two thirds of U.S. school districts and in many schools outside the U.S., as well as by parents, homeschoolers and others. Kadar served as CEO from the company's founding until 2019, when Scott Kirkpatrick was named CEO. As of 2011, BrainPop hosted more than 11 million unique visits each month. BrainPop uses an in-house team of educators, animators and writers