Dr Penny Fletcher has worked in public engagement and science education for over 10 years. Penny is currently the public engagement manager at the Royal College of Pathologists, and has previously worked with Imperial College London, the Royal Society of Biology and the British Science Association. She is also a trustee of her local community garden where she organises outdoor learning workshops for children. Follow Penny's work @RCPath. Dr Sai Pathmanathan has over 20 years of experience in science education. She develops hands-on activities and resources for all ages and abilities, and runs science clubs and community events. She also consults on science communication and public engagement projects, and has worked with organisations around the world including the National Science Foundation, the Smithsonian Institution and the National Science Teachers Association. Find out more about her work at www.saipathmanathan.com.