I made a kindle fire case for Andrew’s sister and it turned out super cute!
I didn’t take photos along the time, but from the pictures you can figure out the basic construction.
I used stiff interfacing for the flap, high loft batting for the pocket, and jersey for the lining. The fastening is a hair tie attached with embroidery floss for strength.
Boy do I love having a serger to make lining easier!!

Skip the batting, if you don’t need it, which would make it a good toy pouch.

I use mine for my Mega Zoom Camera and it works great to protect it inside of a larger tote bag!