Decorate dinosaur cake: Ice background areas and sides of cake smooth. Using tip 4, pipe eye and nostril, smooth with finger dipped in cornstarch. Outline body and facial features with tip 4. Pipe lines for belly and under side of tail. Fill in body with tip 16 stars. Add tip 4 piped claws, spikes and pupil, smooth with finger dipped in cornstarch. Attach confetti to sides of cake. Pipe tip 21 shell bottom border.