PREPARATION:

1. Combine butter, brown sugar and egg yolks in medium bowl. Add flour, baking powder and salt; mix well. Form dough into ball; wrap in plastic wrap and flatten. Chill 2 hours or until firm.
2. Preheat oven to 350°F. Grease cookie sheets. Roll out dough, small portion at a time, to 1/4-inch thickness on floured surface. (Keep remaining dough wrapped in refrigerator.) Cut out 24 large circles with 2-1/2-inch round cookie cutter. Cut out 24 small circles with 1-inch round cookie cutter. Shape remaining dough into 24 (2-1/2-inch) logs.
3. To make rattles, place large circles on prepared cookie sheets. Press 1 log at side of each circle; press small circle at opposite end of each log. Flatten logs slightly.
4. Bake 8 to 10 minutes or until edges are lightly browned. Let cookies stand on cookie sheets 1 to 2 minutes; transfer to wire racks to cool.
5. Decorate cookies with assorted colored icings, small candies and decors as shown in photo or as desired.