Check the listing for details. Blue M&M world small bag. Color: Blue, Condition: Pre-owned. Listed at 10.00 USD. The Blue M&M world small bag is a lightweight and adjustable size backpack suitable for casual activities in nature. Designed by the popular brand M&M, this unisex kids backpack in a vibrant blue color is perfect for hiking and camping. Its small size makes it convenient for young adventurers to carry essentials while exploring the outdoors. Perfect for a day of fun in the sun, this backpack combines style and functionality for a great outdoor experience.