maybe a great big tree in the middle of the quilt blocks. sort of like a great big tree of life. I would also suggest batiks. they seems that they are something hippie ish. at least to me. I would go with maybe more idea than steriotype. I knew a few types that would be called a hippie but they wouldn't be pleased to be styreo typed as the "hippie" most think of. go with her person ality and things she would have in her home.