Studio Lancelot has created a series of school chairs that encourage children to frequently change seating positions in the classroom. They are designed for use in primary schools, andeach boast a different structure and supports multiple sitting positions, inviting children to regularly change their postures throughout the day in a bid to increase their "muscular diversity" as well as their concentration levels.
https://www.dezeen.com/2020/09/10/school-chairs-active-classroom-design-children-studio-lancelot/