This document provides instructions for assembling a cardboard viewer using a printed template, cardboard, and magnets. The instructions are to print the template, glue it onto cardboard and cut it out, then glue numbered lights on top of each other and attach a magnet to the back.

1. Cardboard 1.0
Printer template
Place lens
curved side
down
1.
Print the template
2a.
Glue the template
onto cardboard
Cut out cardboard
3.
Glue light numbers
on top of dark ones
2b.
Assemble as on
g.co/cardboard
4.

3. MAGNET
Fold this flap behind
the other and affix
the disc magnet
to the reverse side