The machine you bought for your DGD is darling. She will treasure it.
I agree with the above suggestions, especially the self-adhesive thimbles. I think making her a needle book would be great too.
I have been carting different sewing machines when we visit the grandkids. And they love sewing at our place when the visit. Even though we aren't near enough to see them nearly enough, it is a tradition and they love it. They each started when they were about 3 and now they are almost 7 and 9. They each know that if they have learned enough and are responsible by the time they are ten, we will bring a vintage machine to their home for their use.