I can't resist but post about seeing another technician doing the chromatography trolls practical on the techognition gallery again this year. I invented this practical several years ago to try and make chromatography a bit more fun for the science club kids and decided to post it to my TES account releasing the idea to the world. Since then it's been slowly finding its way into classrooms all over the place. Obviously as a technician it makes me so happy to feel I've contributed to the fun and learning of students in other schools. Sorry if this is a bit self indulgent but I'm just so chuffed that people enjoy it!