I've participated in career days before and it was a lot of fun. The big thing to remember is: keep things concrete. Use stories and visual aids with concrete e

I've participated in career days before and it was a lot of fun. The big thing to remember is: keep things concrete. Use stories and visual aids with concrete examples. To really keep their attention, a presentation or interactive booth that let's them participate could help here. For the sake of simplicity, imagine a mad-lib style story through problem solving that allowed them to put in funny words for nouns, verbs, and adjectives while you tell a story of solving a problem with programmatic thinking. You'll be able to structure it the same, but the novelty of video games, memes, and music references that will get laughs and will keep them engaged.