thanks a lot that was a really good answer now everything is clear to me
Fine, I'll spell it out for you.
If you need to be told what you 'gained' from any particular activity, you obviously didn't gain that attribute and any answer I give is only going to compound the lie you're going to tell.
well my mentee skived so i didnt reallly gain much, i just want to know what could be gained
I'd just not bring it up at the interview, if we postulate that you get one. Try adding something else to your form, because the admissions tutors are likely going to be able to tell you did nothing if it comes up at the interview.