Don't be deceived - this is no ordinary backpack. Measuring just 3½" x 3" x 2", it's a cute, little coin purse. Wouldn't these make great presents.
Mayra, from So Sew Easy, shows how to make a mini backpack coin purse. Due to the small sizes, it may be a little fiddly, but Mayra estimates it involves about an hour's sewing. The detailed tutorial will step you through the process.