Step 1: Parts
- a bunch of TP rolls
- optional tape or glue if you want to secure the rolls together as an assembly
How many TP Rolls do you need? Well, not quite as many as we had collected for crafts for a friend's day care. :-)
The number would depend on
- how many cables/wires/etc do you want to store
- how many rolls would fit nicely into a row or column in your box
- whether you want to tape the rolls into a set assembly, or have them loose in the box so you can take out a cable in its roll.
Step 2: A Box With Loose Rolls
Step 3: A Box With an Assembly of Rolls
Also an option is the arrangement of the rolls, here it's more like a honeycomb whereas the other was square (I am sure there are more appropriate names for this...).