Here are two pictures of the front and back of a backpack I made for my granddaughter when she was 3. She is now 9 and it is still used. I used a backpack that had fallen apart for a pattern and them appliqued the dinosaurs on each side. When her brother was 2, he wanted to always use hers so I made him one and I will post a picture of it when I can find one. Wanted to try posting so decided to start with this. Below is a picture of the other side of the backpack.
I usually have to buy the webbing but every now and then come across used webbing off a discarded workout bag. I now use purse zippers on the backpacks. Thanks to anyone who took a look.