Thank you for your project, also I am a teacher. I created this version https://www.thingiverse.com/thing:3094932 inspired by your work. At this link you can find other photos: https://www.maffucci.it/2018/09/11/dotbotsmart-un-robot-didattico-veloce-da-costruire/ Other robotic kit projects for my students: https://www.thingiverse.com/Dotbot-io/designs Best regards Michele