Danke schön, Andreas und Wolfgang!

I'm still wondering about the nails. Could the thing covered with roses and stuck with nails be the blanket (or coverlet)? Back when the verses in Des Knaben Wunderhorn were written, did people nail the blanket to the crib (leaving one side open to slip the baby under), by any chance? Or does the German have to mean that the baby has been stuck with nails? Yuck. Unless there's supposed to be a connection with the Christ child?