One day in advance: Prepare spread following recipe directions. Spray pans with vegetable spray and line with plastic wrap; fill with mixture. Refrigerate overnight.

For each penguin, spread whipped cream cheese on a cracker. Cut 1/2 in. strips of carrot and position for feet. Fill bag fitted with tip 3 with cream cheese.

Trim off bottom of Colossal size olive at hole end to create a flat edge. Fill olive hole with cream cheese.

For wings, cut a medium olive lengthwise in half. With scissors, cut 2 "v" shapes in each half; reserve pieces. Attach halves to body with a dot of cream cheese.

For head, cut 1/4 off a medium olive, at hole end. Fill hole with cream cheese and attach to body. Outline and pipe in face and tummy areas with cream cheese.

For eyes, cut 2 small circles from trimmed olive pieces; position. For nose, cut a triangle from carrot; position.

Unmold spread from pans; position large mold on serving dish. Using spatula, smooth ball and score lines for ice blocks. For door, trim off a small portion from side of muffin mold; place flat side down next to igloo.

For doorway, hollow out a small portion from front. Score lines as for large mold. Position penguins around cheese spread. The penguins and crackers are displayed on clear glass plates.