Several days in advance, make color flow leprechaun on waxed paper using pattern. Outline and flow in using tip 2; let dry. Using full-strength color flow, pipe tip 1 facial features, tip 2 buckles, buttons, dots, hair and beard. Make extra to allow for breakage. Set aside.

Ice sides of shamrock cake smooth. Cover top of cake with tip 20 stars; add tip 20 star bottom border. Position sugar cubes where leprechaun will rest. Trim waxed paper around leprechaun; leave remainder attached to back. Position leprechaun, icing decorations and curling ribbon.