Keep books organized and easy to access on Jonti-Craft's Mobile Adjustable Bookcase. This durable wooden bookcase sits on casters, so it's easy to move around your classroom. Plus, it features two adjustable shelves; the mobile bookcase with lip has two adjustable shelves plus a two-inch lip around the top of the unit to help prevent toys and books from sliding off. At the lowest height, the 29-inch model provides one adjustable shelf. Backed by a lifetime warranty. Choose from two styles and two heights.