Bristol board (card stock)
PVA Glue (aka White glue or Elmer's Glue)
Clothespins (4-6 per box) or Paperclips
I got some coloured Bristol board from a convenience store, each sheet is 18"x 22" and cost about 1.50 each (2 for $1 from a dollar store). Bristol board is a kind of crappy card stock.
The sides of the box are 1" high (enough for my tallest figure to sit beneath safely), and the box top covers an area 1.5" x 2.75".
After marking out your lines, LIGHTLY score all your lines then cut the lines where your front and side overlap. Scoring the lines helps in making sure the fold is nice and sharp.
Then fold all your score lines in the same direction.
Apply glue to outsides of Tabs A and affix them to the back of Tabs B
Apply clothespin to hold Tabs A & B together while the glue dries.
|Fold tabs A & B inwards along the score lines, then glue Tabs A to the inside of Tabs B|