In a large bowl, combine Rice Krispies, oats and raisins, set aside.
In a saucepan, over medium heat, combine light brown sugar, honey and peanut butter. Bring to a boil, stirring constantly. Remove from heat and stir in vanilla. Pour over oat mixture, stirring until coated.
Stir in chocolate chips.
Press mixture into a 13 x 9-inch pan or roll into balls. Refrigerate until firm. Cut into bars if pressed into pan. Keep refrigerated.