Download the template, print it, and cut out the pieces you need.
First, take the front pouch band and glue it to the top of the pouch.
Next, glue the school supplies behind the pouch piece so they are visible above the top band.
Then, position the completed pouch and supplies onto the main backpack cutout and glue it in place.
After that, attach the handle by gluing both ends to the top and back of the backpack to form a loop.
Finally, glue the shoulder straps to the top corners of the backpack forming a large loop that looks like shoulder straps.