After searching a while for good PDF templates for Danish Christmas hearts (julehjerter / flettehjerter), I finally found a set I liked. I particularly wanted to make the tweed design.
To start with I tried out making a sampling of different hearts (Nos. 10-13 in the pattern set I used). The design on the right in the dark wood photo didn't work out so well made with felt, because the skinny arms kept breaking as I wove the design. I fixed the broken bits as best I could when I needle felted the design in place, and it turned out alright on the top side of the ornament.