1. Put coconut in a small ziplock bag. Add a few drops of green food coloring and massage coconut in bag until tinted.
2. Put each decorating sugar in a separate shallow bowl. Spread some vanilla frosting on top of a cupcake and roll edge evenly in a colored sugar. Repeat with remaining cupcakes, frosting and sugars.
3. Sprinkle a small mound of green coconut atop each frosted cupcake. Arrange bunny decorations in coconut.