There are several restrictions in the changing process:
You can change your package only once a day.
You can increase your package's time period, but you can not decrease it.
(For example, if you have a 6-month package, you can upgrade it to a 12-month package, but can not downgrade it to a 3-month package.)
In order to change your package, follow these steps below:
1) Click on the 'Subscription Plan' tab.
2) Click on 'Change'.

3. Select your new package.
4. Click on "Submit".
Your Child's package will be changed.
P.S. : On the day you change your child's package, you will have minutes belonging to the first and new package. The next day, your child will continue with her/his new package.