Line a jelly roll pan with aluminum foil. Place crackers in a solid cover with crackers touching. Melt butter and brown sugar; bring to a boil for 3 minutes, stirring constantly so it doesn't scorch. Slowly pour over crackers, spreading quickly to cover all. Bake for 5 minutes in oven at 400F. Watch carefully to avoid burning! Remove from oven and cool for about 5 minutes. Pour chocolate chips over top spreading as evenly as possible. Let them melt and then spread with a spatula. I use sprinkles or colored sugar to decorate. Score with pizza cutter, place in refrigerator until completely cooled. Remove from foil and break into pieces to serve.