Take a square paper.
Fold the paper from one edge of about 1 cm.
Then flip the paper holding the fold and give an opposite fold on it of the same length.
Then flip the paper again and give the fold it to in the same way as done above.
Then flip the paper and fold it to onto it again.
Similarly keep on giving folds of the same length till last opposite edge of the side. (Hold the folded papers properly)
You will get a layer of zigzag folds.
Then take one corner of the layer and twist it upwards making a good crease, then give another fold on it.
Hold the twisted fold and spread the other edge.