@dee.3044 - Congrats for taking this on!
My recommendation would be to actually DO a lesson with the students. Hook them with something fun and interactive.
Maybe do the classic "tell me how to make a peanut butter and jelly and which" activity where YOU act like a computer, following the directions, making sure to follow dirrections exactly - for example, if someone says"put the peanut butter on the bread". Take the can, and physically put the can on the bread loaf. Get different directions from different kids one at a time.
Then de-brief into "this is why we need computer science"... If they have fun, they will want to do it.
OR, are you trying to convince adults that kids should learn CS?