As an autistic person I am very much naturally a "Little", even though I am an adult. All my life I have had very juvenile and babyish interests, like mutely sitting on the floor with a blankie spread-out on the living room floor and simply playing with LEGO blocks, G. I. Joe, Erector Set, and toy cars and trucks.
In reality, I never stopped mutely playing with my toys, except when my late Mom ruthlessly made be destroy my toys and throw them away back in 1985. Anyway, I had to spend money to purchase toys to continue to be "little".
Anyway, before bedtime @ ~ 1:30 AM I am mutely playing with some of my toys and being "Little".