Cover marshmallows. Melt white Candy Melts candy according to package directions. Use candy colors from set to tint portions of melted white candy pink and green. Reserve some white. Insert stick into marshmallow. Use melted white or pink candy to dip marshmallows. Chill until firm in stand, about 10 to 15 minutes.
Make candy handle. Use melted white or pink candy in cut parchment bag to pipe handles, 1 in. high x 1 in. wide, on parchment paper-covered cake board. Chill until firm, about 5 to 10 minutes. Flip handles over and use melted candy to overpipe on back side. Chill until firm, about 5 to 10 minutes.
Decorate marshmallows. Use melted candy in cut parchment bag to attach jelly beans and candy handle to marshmallow. Use melted green candy in cut parchment bag to pipe grass around jellybeans. Chill until firm, about 5 to 10 minutes.