Last week, Thales UK and Thales Alenia Space announced their MARSBalloon 2021 project. They plan to launch more than 150 experiment capsules on high altitude balloons 30km up into the Earth’s atmosphere in June 2021. At those altitudes, the gas pressure, temperature and radiation are very similar to those on the surface of Mars. Perhaps the most exciting aspect of this project is that UK students will fill those experiment capsules. School students and science clubs can carry out Mars-analogue science experiments, with no costs beyond materials and postage. The only catch? It has to fit into a plastic Kinder Egg™ capsule.