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!
Top 10 Valentine's Crafts for Toddlers-Love, Play, Learn Should you appreciate arts and crafts you really will really like this info!
Kids Finger Paint Card Ideas from Easy Green Mom
Kindergarten Valentine Butterfly, but would work for preschoolers too
Valentine’s Day heart Decoration with yarn