I have done it, with a coupke of collegues in the school, same that with your sister but heavier, put the saddle a bit down and tell them to use the legs to don't fell.
your sis was easier to convince, and probably fearless, but the adults get the concep and explinations easier, so kind of compensate.
I have done it, with a coupke of collegues in the school, same that with your sister but heavier, put the saddle a bit down and tell them to use the legs to don't fell.
your sis was easier to convince, and probably fearless, but the adults get the concep and explinations easier, so kind of compensate.
I did it in a couple of week, one hour a day.
good luck