It would be important for me to know how old are your children and also do they have any previous knowledge of the english language because it will be important for me to create a program for them, that is one hour lessons yet for that too I would need to know how much would you be willing to spend, and what would you like your children to learn, just the basics such as hello, good day etc, or more deep conversing? I can create a program but you have to tell me how much would you be willing to spend because one class is 2 hours minimum (40usd) per day, and in my personal opinion, depending on what would you like them to learn the program i would create would last anywhere between a week and 2 months, so please feel free to let me know specificaly what did you have in mind so I can give you the details on the rest :)