After a few days working on the bag together with my son, I can tell you that this is one of the best experiences I’ve had with sewing. It is so wonderful, to hear him express his ideas, looking for fabric and colours, thinking of pockets and zippers. He knows what he wants and knows how to explain that to me.
Inside the bag he wanted a few pockets for small items like his cell and his wallet,
and a large pocket for his tablet.
He wanted an adjustable long strap, which can be taken off from the bag,
a zippered pocket on the back and a small embroidery with his initials,
and pockets on the front. Together with two handles that completed the bag!
As you can see in the first 2 pictures I used bias tape for the seams; that way it looks a lot nicer and I don’t have to worry that the seams get disturbed in any way.