How to make a heart origami boat (page 12)

 

21. Apply "open sink-folds" of the step #20.

22. If you want more challenge, you could try both "closed-open sink-fold" and "open-closed sink-fold" instead of two "open sink-folds" . If it is too difficult, then stick with two "open sink-folds" .   Prepare to apply two valley-folds.

 

 

 

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