num_pages: 104
description: Constructions and experiments with different toys and mobiles introduce the basic principles of balancing
language: English
title: Mobiles: Building and Experimenting With Balancing Toys
titlecomplete: Mobiles: Building and Experimenting With Balancing Toys (A Boston Children's Museum Activity Book)
genres: Nonfiction
ratings_count: 3
series: Boston Children's Museum Activity Books
publisher: Beech Tree Farm Pubns