Make skeleton parts. Melt white Candy Melts Candy according to package directions. Tint gray using black candy color from set.
Fill head and arm cavities of mold with melted gray candy. Chill to set in refrigerator. Gently twist mold to release candy.
Bake and cool cupcakes.
Prepare icing. Tint portions green, dark gray and black; reserve some white. Use tip 233 and green icing to pipe grass on tops of cupcakes.
Use tip 2 and white icing to pipe eyeballs.
Use tip 1 and black icing to pipe pupils, mouth and nose. Pat mouth and nose smooth with finger dipped in cornstarch.
Use tip 1 and white icing to pipe teeth. Pat smooth.
Use tip 2 and black icing to pipe eyebrows and hair.
Use tip 1 and dark gray icing to pipe bags under eyes.
Position candy skulls and arms on tops of cupcakes.