"...and is someone 'watching' them??"
OPINION-SPECULATION:
If they are having this much trouble by getting on a school bus instead of a regular bus, give severals reasons as to why they did this -- probably someone is watching. After all, they may start getting into personal cars thinking they are taxis...I mean...assimilating to American culture can be difficult.
Here's a link to one of the Eunice Stone threads on FR. Just take a look at some of the comments...:-(
http://www.freerepublic.com/focus/fr/930375/posts