We look at the basic origami valley and mountain folds here. We show you step by step photos and directions on how to make the basic origami valley and mountain folds.
File:Origami Valley-fold.svg - Wikimedia Commons
PDF] MIURA FOLDING: APPLYING ORIGAMI TO SPACE EXPLORATION
Learn How To Make Mountain Fold and Valley Fold, Origami For Kids
How to Make a Mountain Fold (Origami)
A crease can be folded as either a mountain fold (left) or a valley
How to apply a crimp-fold in origami: page 1
How to apply a valley-fold in origami: page 1
Origami Valley and Mountain Folds - How to make Origami Valley and Mountain Folds
Origami: Classic Paper Folding - ABDO