This pretty nature-inspired project was made by my Vice Principal's class. He's a super creative teacher and ran a class called "Snow & Ice"- a perfect class for where I live in Canada as our winter is around 5 months long!
He had the kids collect fir branches, berries, pine cones, etc from a nearby park. For a mold, they used an aluminum pie plate. You need to place a circular object (small yogurt cup, etc) in the center towards the top. Then place all the natural materials around it and fill with water. We simply need to place these outdoors for them to freeze overnight! Once frozen, briefly dip in hot water to release the ice wreath. Tie on a thick ribbon and hang somewhere. If it has berries, birds will eat them as they thaw!