Step 3Attaching fins
Then fold and glue the fins together. Stippled lines means "fold backwards", whereas straight lines means the opposite.
You can use hot glue to glue the fins together, but I find that white glue (Elmer's glue or wood glue) works well.
Then glue the backside (the white side) and attach it around the straw, approximately 1-1.5 cm from the open end of the straw.
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