First of all, there are additives in the raw materials for making these things. Secondly, butter will be used in these foods. There are two kinds of butter. One is margarine, which is widely used. The main raw materials are trans fats, spices, pigments and other additives, which are quite harmful to human body. Although children's digestive system is better, they can't digest it if they eat too much, especially cakes, butter biscuits and fresh cream cakes, which are basically trans fats.
Another kind of butter is pure animal butter. There are fats extracted from milk, which are basically imported and very expensive.