I didn't read the letter but my mom's friends had what they called a "grandma" shower. They met for lunch as was their usual but one particular month they brought items for my mom since she was the first grandma in the group (by probably 10 years). Nobody who didn't normally do lunch with that group of friends was invited, there were no games, events, etc. Mom had no idea ahead of time. They gave her things like a bib that said "Grandma Loves Me" for her to keep at her house, a book she could read to the baby, stuff like that. Nothing big, no registry, just tokens.