Compound term: Willow branch.
One Easter tradition in Finland is for children to go door to door dressed up as witches carrying willow branches with bright colored feathers and streamers attached. They wave their willow branch and say the following spell when you open the door:
Virvon, varvon, tuoreeks terveeks, tulevaks vuodeks; vitsa sulle, palkka mulle! (”I wave a twig for a fresh and healthy year ahead; a twig for you, a treat for me!”)
The little witches are more likely to be out on Easter Saturday in western Finland, but on Palm Sunday in other regions, including Helsinki.
Read more on the tradition here.