What you need:
-Foam sheets in red and yellow, you can also use sturdy construction paper or card stock
-Glue
-Stapler
- Cut foam sheets (mine are 8.5X5.5 inches) into Miter shapes
Glue on yellow crosses (note to self: buy more sticky foam shapes after Easter)
Fold bottom up (backside) about 2 inches
Fold in half and staple the 2 bottom corners together. Done!