On behalf of The Bloomsbury Centre for Skeletal Research (https://bloomsbury-skeletal-research.org/), Astrid Novicky (ESR 14) and Soraia Silva (ESR 9) were part of the outreach activity “What are bones made of?”. Last 14th of June, 2017 this activity took place at the Convent of Jesus and Mary Language College (London). For an entire morning the ESRs talked to year 9 students about bone biology, studying at University and careers in science. A little experiment was performed with bones: after having some chicken bones incubated in vinegar and some baked in the oven, the students were invited to try to break them and realise why one condition is more easy to break than the other. At the end an explanation about bone mineral content was given.