How do you build a structure out of toothpicks and marshmallow?

Well you could make the structure by taking the marshmallow and shaping it into triangles and then connect it together so it looks like a bridge and then if that does not work then try building squares and then putting triangles in the middle and then getting some toothpicks to connect it.

Questions

Is there a limited amount of marshmallows or toothpicks you are supposed to use?

Is the structure supposed to hold something?

Like a text book, a book, or ect.