In this instructable I will try to show how I made my Portal bookends. I do not have the skills or the tools to make a fancy work so I tried to simplify it as much as I could. The items used are cheap and can be found easily.
The materials used were:
First I used the craft knife to remove the white part inside the portals, due to lack of skills my cuts were not along the lines and my knife was damaging the paper.
Secondly I separated the two portals and stick them to the uncool bookends. I got lucky here beacuse my portals were perfectly aligned with the margin of the paper, so I did not have to cut it.
After the adhesive paper is on the bookends we cut the excess paper along the bookend line.
Repeat the process for the other portal.