2. Fold the left(or overlapping) side of the straw behind the the other straw, thus creating another 90 degree angle. The previously left side is now on the right.

3. Fold the right now underneath side of the straw behind the other side of the straw. The right side is now on the left. Your first triangle should now be formed.

4. Fold this trianlge behind the two ends of the straw. Form four more seperate triangles by repeating the same basic process. However, each time, remember to fold the underneath side over the the top side. After each two folds of the sides, fold them upwards to form a triangle infront of the last one.

5. You wish to have five triangles in total.

Tip: There may be much resistance from the straw while foldig the triangles. Make sure you hold onto your triangles tightly, or they may collapse.