Step 16 continued: Your wings now look like this when closed. Set this piece aside for now.
Step 17:
Take the card and apply a small amount of glue to the grey areas labeled “A”.
Step 18:
Take piece “A” and match the tabs with the gray areas. Piece “A” lies flat, and the middle fold should line up with the middle fold of the card.
Press the left tab down first...
...then the right side. Press down on both tabs firmly and allow the glue to dry.
Step 19:
Now apply a small amount of glue to the grey area on the left, labeled “B”.
Step 20:
Take piece “B” and match the left tab with the gray areas. Piece “B” lies flat, and the middle fold should line up with the middle fold of the card.
Press the tab down firmly and allow the glue to dry.