Hello all, I am preparing to build my daughter a playhouse. The only hitch I am having is with the windows. The windows are going to be approximately 18x24". I have found acrylic clear sheets(safer/unbreakable) to use, problem is I do not know if I can just buy a window frame and put the acrylic plastic in it or if I need to build the window from scratch. If I have to do it from scratch I have no idea. Can anyone help me please? Give me some tips!!!