I have a 3-year-old daughter, so sometimes my little parts get some play through playing with her. But, even so, I have a couple of stuffed animals that are just mine, not my daughter's. I also have done things like adult coloring books or just getting lots of fancy colored pens for drawing, and what I basically do is a collaborative thing: I am co-conscious while little play or color. I won't lie - I sometimes buy toys for my daughter purely because my own little parts want them. But, I don't play with her toys without her. I do sleep with 2 little stuffed animals who also come w/ me to therapy. It works for us.
I do have to say - I feel sometimes like my little parts get "fed" just through watching my daughter play.