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!
Rosh hashana cards: Kid made DIY String Art Flower Cards These pretty handmade cards are fun for kids to make as a spring craft or Mother's Day card. They're also great for practicing fine motor skills and/or beginner sewing for kids!