Make mummy shell. Melt white Candy Melts candy according to kit directions. Use melted white candy and cut decorating bag to pipe a thin coat inside mummy mold. Use brush to paint sides with melted candy to form shell, 1/8 in. thick. Chill until firm 5 to 7 minutes.
Make mummy. Prepare no-bake pop mix and fill mummy shell according to kit directions. Position pop stick. Use melted white candy and cut decorating bag to cover top. Tap to settle. Chill until firm 5 to 10 minutes. Unmold. Use warm knife to smooth edges.
Decorate mummy. Melt 1 oz. green Candy Melts candy according to package directions. Use melted green candy and cut disposable bag to pipe dot eyes. Chill until firm 3 to 5 minutes.
Make base. Use scissors and gray cardstock to cut a strip, 19 in. x 3 in. for side and a circle, 6 in. dia., for top. Use glue gun to attach strip and circle to craft foam circle. Use black marker to draw spider webs.
Assemble centerpiece. Use pop stick from kit to poke holes on top of base in desired position. Insert mummy pops in base.