"A traditional Finnish Christmas craft, Himmeli are related to straw decorations in Sweden, Latvia and Romania."
Finnish traditional christmas decoration. Life: Kauniita himmeleitä
The site is in Finnish - used dried stems of Deschampsia cespitosa (tufted hairgrass) and string this snowflake/star together with thread (not sure what to use for a needle). The author says that straw is too thick.
DIY: Finnish Himmeli Mobiles
LA-based designer Momo Suzuki creates a himmeli mobile. Photograph by Jeana Sohn of Closet Visit.