Step 4: Anatomy of the Triangle and Stacking
Before you stack pieces, you have to understand the anatomy of a triangle.
A triangle has two pockets and two points. Each point fits inside a pocket.
When you stack, you are building it in one line, so the two points of one piece fit into the two pockets of another piece.
When you're building, one point will go into the pocket of one piece, but the other point will go into the pocket of another piece.
I chose to stack my pieces in increments of 10, but you can do more if you'd like.
As you make the pieces, it's helpful to stack them. This helps to open up the pockets to make the structure stronger, as well as helps you count how many pieces you have. Stacking pieces opens up the pockets, allowing for stronger structures. Though it's technically not necessary, I highly recommend it as it will keep your structure together and give you an easier time building.
To stack, slot the two points of one triangle into the two pockets of another triangle. Keep going for a few pieces, and once they expand in size, take the unopened triangles from the end and add them to the front. This way, you have a stick of fully opened triangles.
To take the triangles out of the stack, simply put your thumb right under the first triangle and push up. Once you've got the hang of it, you can take triangles off in seconds.