The first little pig built his house with straw.

Quick Scoop

In the classic story, the first pig’s straw house is quick to make, but it is not very sturdy. That is why the wolf can blow it down so easily in most versions of the tale.

Tiny Story Note

The story usually contrasts the first pig’s straw house with the second pig’s wood or sticks house and the third pig’s brick house. That contrast is the main lesson of the fable: faster is easier, but stronger materials last longer.

TL;DR: straw.