Ok so I'm having a hard time coming up with a gift for my SO's mom for Mother's Day. We got my mom a new recliner. For Father's Day we plan on getting my dad a whole house humidifier (he's been talking about one for months!) and SO's dad mentioned he wanted a kindle paper white so we are getting that for him. For SO's mom I was thinking about getting her a necklace with Grayson's birthstone but I want to be able to add to it when she has more grandkids. I was thinking something like this but didn't know if these necklaces were dated or not:

What do you awesome ladies think???
Re: Mother's Day gift help