At first you need:
Playwood 8mm, because the tablet is 7mm thick.
Bike inner tube
Some tiny screws
Water based primer/stain
The main idea is to made it with the lowest budget and as fast as possible.
And to have a secure enclosure for the device.
Step 1: Prototyping With Cardboard
After that bring the draw to the plywood, saw it and smooth it.
You need three pieces, one for the bottom, one for the front cover And the last for lodging .
Step 2: Glue
If you meet extra access holes for pressing button or access to the USB port, cut out the needed pieces, before the glueing.
Step 3: Camera Hole
Step 4: Stain
I used a single hand, and the result was a little rough. For me it was enough.
Let it dry and than continue...
Step 5: Hinge
Even to hold the tablet at place I used the inner tube. Cut some long strings and try to don't hinder the devices operations like front camera, light sensor, touchscreen or buttons.
If the tablet is overheating think of doing some holes in the back of the wood.
To protect the screen glue some fabric on the cover side.