Weddingbee boards

I'm hoping someone here can help me write a short little poem to go on my SIL's bridal shower invite. Backstory: We're throwing her a school-themed shower because she and her FI went to preschool together and that is also where he proposed to her.

The invitations are these http://www.etsy.com/listing/56619044/semi-custom-cute-save-the-date-teacher , but I want to be sure that those invited know why we're having a school-themed shower (otherwise it just seems random and not everyone knows her well). 

I was thinking of writing a short rhyme on the chalkboard, but all I can come up with is "She met him in preschool and thought he was fun, so now down the aisle they will soon run!" 

It's totally cheesy, but it's all I got! Plus, to me it sounds like they've been together since preschool, which is not the case at all. 

Anyone willing to make a go at it? Thanks!!!

@kitzy: So you don't think it sounds like they've been together since preschool?

I feel like I need an outsiders opinion because there will be like 70 people invited to this shower, and a lot of them don't really know her or him. I just want to be sure it makes full sense!!

Cute!! I have more to go on now. Thanks ladies!