Adelaide's room is cozy, cluttered with stuffed animals, colorful posters, and a small pile of toys. Sunlight streams through the window, casting a warm glow. Sid, the older sister, is on all fours, her face animated with excitement, her tail-wagging imaginary. Adelaide, the youngest, bounces around on her knees, giggling, her tiny hands reaching out as if to nuzzle her “puppy” sister.

Sid: (panting softly, tongue sticking out) Arf! Arf!
(She wags her imaginary tail vigorously, tilting her head and looking at Adelaide with big, playful eyes.)

Adelaide: (clapping her hands, squealing) Woof! Woof! (She crawls closer, wagging her imaginary tail just as fiercely.)
(She playfully nuzzles Sid’s shoulder, then rolls onto her back, giggling.)

Sid: (pretending to lick Adelaide’s face, with a goofy grin) "Good girl! Who’s a good puppy?"
(She nuzzles her sister affectionately, then barks softly again, tail wagging with enthusiasm.)

Adelaide: (giggles, trying to mimic a bark) "Ruff! Ruff!" She then wiggles on the floor, pretending to chase a toy—an invisible ball—clumsily pouncing on it and rolling over playfully.*