They have to act like a normal child so people don't think they're possessed.
Don't just list facts. Describe the physical sensation of two lives colliding: 1 : I Recalled the Memories of My Past Life...
High-pitched ringing or a blur of images (subway trains, office lights, a hospital bed). They have to act like a normal child
Seeing an object that looks exactly like something from Earth (a toy, a book, or a specific tool). 1 : I Recalled the Memories of My Past Life...
Memories don't usually just pop up for no reason. Pick a catalyst: A minor head injury or a fever dream.
Trying to see if they can still do math, cook, or use "future knowledge." 5. The Hook End the chapter with a realization that raises the stakes:
Realizing they have parents or siblings they didn't have before. 4. The Immediate Goal