B.S.
I think you can make it simpler too.
I'd leave a note saying Alicia told me the boys get along very well so I was hoping we could meet up for a play date outside of school. Then suggest a date time and place. Leave your name and phone number and leave it at that.
Personally, as a mom who met with a family outside of school for the first time, I felt more comfortable meeting at a public place vs their home. They ended up being great people, but had they not been....being at their house would have been uncomfortable & torture for me. (Because I tend to be a shy type of person, myself) So I would suggest a public place for meeting.