You can use any shape. It doesn't have to be a bunny. Just trace a shape or cookie cutter. This would be cute for any holiday, just use an appropriate cookie cutter to trace and cut out the shape, then whatever yarn works best for that holiday!
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Doesn't link to anything, just a cute idea. Cut 2 egg borders (the frame) out of card stock. Glue tissue paper strips on one (and finish with shapes as desired), then let dry. Put frame on the back (to finish the edges) and voila.