Wizards of Waverly Place (2007)

S3E6 Doll House

Upon discovering that her family is relocating, Harper is invited by the Russos to stay with them. As Alex and Harper tidy up the basement to accommodate Harper's belongings, Alex decides to shrink herself to fit into her childhood dollhouse. However, in a twist of events, Jerry and Theresa unknowingly gift the dollhouse, with Alex still inside, to a young girl named Olive. This unexpected turn leads to a series of adventures as Alex tries to navigate her new, miniature predicament.