Unfortunately, Instagram does not provide a built-in or native method to create a feed in order for us to pull in their images.
Instead, there are a number of third party tools to try which allow you to create an an embed and insert the embed into one of your Ad unit slots (Which are available only to PRO). Paper.li does not take responsibility for the functionality of these third party services. This article is for informational purposes only.
An example paper showing an embed of Instagram in use is found here. The embed in this case was created using a service called Snapwidget. In this example, the free widget was created via Snapwidget and the code they provided was inserted into the leaderboard ad unit position of the paper.