At least 2 days in advance: Make
monkeys using royal icing. Make 2 copies of each monkey pattern; place 1 copy on board, cover with waxed paper and secure with tape, (use 2nd copy for reference while piping). Build up body with tip 10; smooth with spatula. Pipe in tip 8 stomach (pat smooth with finger dipped in cornstarch). Pipe tip 8 ball head; pipe in face and ears with tip 3 (pat smooth with finger dipped in cornstarch). Pipe tip 6 outline legs, arms and tail. Pipe tip 3 eyes and mouth, tip 1 dot nose and outline teeth on top monkey. Pipe tip 10 dot coconut and tip 3 motion lines, 3/4 in. long. Let dry.
On cake, outline trunk and leaf sections with tip 3. Fill in cake with tip 16 stars. Carefully peel off monkeys, coconut and motion lines from waxed paper; position on cake.
Combine brown with red-red for brown shown. Combine brown and orange with golden yellow for orange shown. Combine leaf green with lemon yellow for green shown.