Absolutely I have some tips for this! Find the parts in their middle self that you both enjoy, identify those together, and really drill them down into base components.

For instance: Maybe your middle likes to act out so they get guidance because maybe that guidance feels very warm and loving and helps put them on a path for their day? Explain it like that and find a way to just seek that part out without necessarily going through a full ageplay scene.

It's all about that, there is no "traditional" kink, as much as other kinksters want to think there is. What your process as a Caregiver looks like is likely going to be entirely separate from what my process as one looks like, and that's great! It's sort of like my last answer, but the best way to identify and drill down your or their kink is to isolate the kink up until the moment that the kinkster feels good, identify WHY the kinkster feels good, and look for options to fulfill that and remove everything that gets in the way of it. Maybe how this comes out looks like a "traditional" (again, massive air quotes, tradition in kink is a myth) Caregiver relationship, and maybe it morphs into something entirely different or something completely unique to you!