you need those fruits, then lots of sugars, gelatine, those canned bottles and it takes a couple of day before the jams can be used. It is not worth to make it in Singapore coz you need lots of berries etc. When overseas, during summer, I got lots of free berries from friends especially in Van coz they plant in their garden. And in Oz, we go to the farm market and get so it is like a big bucket for a couple of dollars.