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!
Egg Carton Baby Bee Craft for Kids: Turn an empty egg carton into a cute bumblebee. Easy art activity for preschool or kindergarten! (Great for insect or bug units and perfect for spring, summer, or Earth Day!