Large flat styrofoam (Brooklyn)

I am making a project for a little girl who like to have a styrofoam Castle I need large flat long styrofoam pieces that could be little fat for me to cut if you have any or if you know somebody who's packing a large project and don't need to styrofoam pieces please contact me I want to build this person a castle it is my fiance is a little boy and he likes medieval stuff he's artistic so I want to build them a little castle over his bed so he can actually believe that he's in there but he can't have anything hard plastic so I thought styrofoam would be perfect for him thank you so much Joe oh PS I live in West 2nd Street in Brooklyn please if you could deliver it that would be great I live on a private landing so you could just put it right on my landing and I don't know if I could pick it up because I don't think I can put it on the train but if you have to cut it in halves that would be good thank you so much Joe