Outline skeleton using white icing. Pipe in skull with tip 8. Pat smooth with finger dipped in cornstarch. Pipe teeth with tip 4; pat smooth. Pipe ribs and small bones in arms with tip 8. Pipe center of ribs, shoulders, hips and large bones in arms and legs with tip 12. Pipe fingers, feet and toes with tip 6. Pat smooth with finger dipped in cornstarch.