My mother died young, she was 63 years old. She was an amazing Grandmother. The eldest was in grade eight when she died, just before her grade eight graduation (my dad, also an amazing Grandfather passed away just before the eldest graduated from grade 12). Middle child was in grade five and the teenage boy was in grade three when my mom died.
My husband has always worked shift work, so when the kids were young my mom pitched in and helped me. She babysat on a moments notice, drove kids to school when I worked, had a stash of toys and videos at her house just for her grandchildren. There was nothing she wouldn’t do for them.