I am throwing a baby shower for my sister in a few months and she has expressed interest in an idea she got from Pintrest where each guest is assigned a letter of the alphabet and is asked to bring that letter as a gift with a note to the baby written on the back in order to create a special alphabet wall in the baby's nursery. The idea is that you get all sorts of different letters on various sizes and styles that end up looking (hopefully) something like this:
However, my sister is pretty picky and wants me to somehow convey that she doesn't want arts & crafty stuff like this:
But wants eclectic/rustic/modern letters like in the first picture.
As a host, I am completely at a loss on how to convey a message like this or if there even is any appropriate way to do so. I feel like she is being too picky and if she wants others to pick out her alphabet, then she needs to be OK with whatever they pick and, of she doesn't like a letter, then she can choose not to use it. But I also really want to please her on her big day and make this shower everything she is hoping for.
Is there anyway to express her desires to guests without being tacky? Thanks!