Lange Nacht der Wissenschaften is a beloved event across Berlin, and this year’s edition at Humboldt-Universität zu Berlin Institute of Physics was no exception. The Berlin Optik Student Chapter participated once again in LNDW with three experiments. We demonstrated experiments from “Optics Suitcase”, supplied to our chapter by OPTICA. Audience ranging from toddlers to grown-ups were familiarised with the concepts of polarisation, diffraction, and selective reflection.