How do i start kittens out eating regular cat food?



I bought this "2nd Step" KMR weaning powder to mix with water like the guys at PetCo said I should do. Well the kittens arent big fans of it to say the least. Should I mix the powder with water and regular cat food and blend it? Their mother, Poptart, has been exhausted and Id really like to start the kittens on their own diet. They are about 6 weeks old now.