Young grandma, help me find a fun nickname?

My daughter is pregnant with my first grandchild. My mom is not yet 60, I am 38. My own grandmothers are grammy, and mawmaw. My mom is called nana. I thought I would like Nonni, but my daughter doesn't because it sounds like mommy. So, help me find a neat, fun, nickname for this very young grandmother, please?