Preheat oven to 400°.  Line cookie sheet with aluminum foil.  Spread crackers on bottom of lined pan.  In small saucepan, bring butter and brown sugar to a boil; boil exactly three minutes; stirring constantly.  Remove from heat and pour over crackers.  Place in oven for 5 minutes.  Remove and sprinkle with collage chips.  Let stand for a few minutes, then spread softened chocolate chips with knife.  Sprinkle broken up peanut brittle on top and then chill.  Remove when chocolate is hard.  Break into medium size chunks.