Bake pecans and coconut in shallow pans at 350 degrees F., stirring occasionally, 5 to 10 minutes or until toasted.
Combine pecans, coconut, and crushed cereal in a medium bowl.
Bring sugar and butter to a boil in a small saucepan over medium heat, stirring constantly; boil, stirring constantly, 1 minute. Pour over cereal mixture, stirring until coated.
Press half of cereal mixture into a 9-inch square pan lined with plastic wrap; freeze until firm.
Spread with ice cream; press remaining cereal mixture over ice cream. Cover and freeze 8 hours or until firm.
Cut into bars.
Recipe submitted by Joyce on 7/20/00