If it were really the only
school offering open days before the summer, why not? However, it is not the only GS offering open days/evenings before the summer holidays.
Here is the calendar for this year:https://www.birminghamgrammarschools.or ... -open-days
In this list, you can see that there are open evenings at BV and Handsworth Grammar School.
Personally, even if I were aiming at KEA as my first choice, I wouldn’t make my son miss a morning at school to visit a GS if he could visit some other GS in the city in the evening or on a Saturday morning…. But this is just one opinion which could be argued against!
Whatever you choose, best wishes for the 11+ prep!