for a while before i really understood myself, my main mode of regression was involuntary, so im still just figuring out ways to indulge in it by my own will
before i go to sleep i pop in mai chupete
and just watch kiddie TV shows, doll by my side
i will dress up my dollies and play with them, or try drawing, i havent done this yet but i want to buy myself a colouring book and a sippy cup hehe, all this stuff i can do when no one else is around, like at night before sleeping.
in my day to day, i like to bring small toy cars around with me, or little figurines, things i can keep in my pocket.\
my wardrobe is something like 25-35 percent real little boy clothes from walmart, since i can actually wear it! im short lol. My watch is sonic the hedgehog and my backpack is blue and soccer themed, these things are little no matter what i wear, my watch is something i can wear at work, so maybe that is something helpful for you, but i try to avoid littlespace while working since my work is SERIOUS!!!
... i am still crossing my fingers to find cute little boy shoes that will fit my feet, but i havent had any luck yet
honestly, you can be little without all this stuff too! At school I like to sit on the tables in the halls (everyone does this) and dangle my feet, it makes me feel little because its like how, when you are a child, your feet will dangle in most chairs :3 and i like to sing nursery rhymes to myself , its the little things sometimes.