We (I was helping my 8 year old with this project) started out with two fabrics and matching thread.
Start folding up the short end to create two pockets, one over the top of the other, with a flap on the top, that can be folded down over everything.
Pin the pockets into place. To make it easier, draw lines where you want the pockets to go, with a fabric pencil.
Sew the pocket lines. Don't forget the side seams!
My five year old helped with the next project: a case to hold Dad's gps.
I wanted the strap to wrap around the case so there would be a loop where Dad could attach the case to his belt if he wanted.
For our final project, my 7 year old made a case for Grandpa, similar to the gps case, but instead of a strap with a button closure, we had a flap on the top that folded over the front and we used velcro to close it.
Happy Father's Day DAD!