Stanley peeks around corners curiously and excitedly as he runs around, he can hear narrator calling for him but since he regressed, all the little boy could think about was playing. So he started playing two person chase hide and seek with narrator being it, and not knowing they were playing. He giggles mischievously as he hides

(in this au all people are either a little or a caretaker or a mix of both. When regressed the person in question turns into the age they mentally regressed to as it is random though usually within an age bracket. Regressions last anywhere from minutes to a week, any longer and something is wrong. They can fight the regression but there is a long list of side effects including: insomnia, extreme irritability, changes in appetite, dizziness, fatigue, and even getting sick. Caregivers act like parents. Edit: regression is also physical meaning actually de-aged for the duration of the regression when I say toddler I mean toddler though littles have vague memories of their adult selfs and when back to adult form the memories are fuzzy like they had just woken from sleep though the emotional bond stays the same. In times of extreme fear, it can cause a little to regress further in age.)