"alex" is OBVIOUSLY a liar? I don't think so. In my humble opinion, that's NOT OBVIOUS from his post.
But what IS obvious from it is that "alex's" English is not so good. However, that might not matter very much if he's just teaching children below the age of ten. With a name like that, Colourful Sunshine will be a training centre, meaning it must in all likelihood be crappy. Well then, crappy training centre and a young foreigner clowning around in class pretending to be a teacher - a good match, isn't it?