It sounds like there are a lot of teachers out there that use Realidades and are looking for ways to incorporate TPRS and CI into it, beyond what the TPRS supplement suggests. I typed up this document for one such teacher, and I am sharing it here for anyone else who finds him or herself in the same situation. If you are a Realidades teacher, please visit the link below to the editable document and add in activities that YOU use in each chapter!
The most important thing to remember, IMHO, is that you don’t need a fancy story or a clever activity to teach something with comprehensible input. CI is the most natural way to use language, because all you have to do is lead a conversation with your students that involves the words or grammatical structures that you are trying to teach. Get lots of repetitions, and your students will acquire the language!!