Gather a BIG stack of recycled paper.
Cut out 4 squares on each sheet.
Stack each square sheet on top of each other and glue across the top. Use bottle glue.
Cover the glued top with wax paper.
Place heavy objects on top and leave them there overnight or for a few hours.
Gently peel off the wax paper.
Congrats! You just saved yourself a trip to Staples.