I've got only one twin :V
Yes. Its only grade 3... Not like it's grade 6,7,8...
And they started learning the same time as my other grade 4 students... And my other students have progressed to grade 6 songs already... They can't even play the first part of their exam piece properly. It's the easiest part of that song... as patient as I am, I still get frustrated by students who don't bother to practice properly...