Corn was important to the Iriquois ...it was considered "one of the three sisters" so he incorportated that...they lived along the water...which he made with tiny glass beads. The grass was made from spanish moss.
Here is one of the Iriquois Indians that Isaac made. Inside you can see the beds/work areas that they slept/worked on. Each section had many family members living in it. Imagine a long house with a long hallway running down the middle of it...a fire in each section...animal skins hang on either side to give privacy to the different families with in the family...notice the corn hanging in the "rafters"....they had nets that hung from the top to hold their belongings as well.