num_pages: 128
description: The Aldens are helping one of Grandfather's friends break a world record by building the world's largest yo-yo! But someone follows them, and then the plans for the yo-yo turn up missing. Someone is trying to sabotage the yo-yo before it's launched!
language: English
title: The Giant Yo-Yo Mystery
titlecomplete: The Giant Yo-Yo Mystery (The Boxcar Children, #107)
genres: Middle Grade, Audiobook, Childrens, Chapter Books, Fiction, Mystery
ratings_count: 233
places: The United States of America
series: The Boxcar Children
publisher: Albert Whitman & Company