Explain to Me Like I'm 5 is an initiative aimed at promoting informal conversations about STEM topics to the general public, especially school-aged children. The goal is to break down barriers between STEM fields and young audiences by simplifying complex concepts and illustrating their real-world applications. The initiative is aimed at primary and secondary school students, as well as the general public, with the purpose of bringing science closer to society. The online sessions, which take place on Saturday mornings for about an hour, feature Tech Scientists explaining scientific concepts and answering questions from children and other curious people. The explanations are simplified and made accessible to a younger audience, with a focus on illustrating the relevance and applicability of STEM fields. Sessions are streamed live on Facebook and then uploaded to YouTube, making them accessible to a wider audience. Those who participate can submit questions in advance via the project website or via live chat during the broadcast. Launched during the confinement by COVID-19, this initiative seeks to make science and engineering more understandable to young people and their families, and to spark their interest in STEM subjects.