I think a smartphone with a good audio recording app is a convenient option. It's something you always have on hand and can easily transfer the recordings to other devices for storage and editing.
Another great type of story could be the ones where she overcame difficulties during hard times. Maybe there were stories of how she managed to get enough food for the family during a shortage, which would show her resourcefulness and strength.
There's not enough information given to determine exactly who the grandma is. She could be a character specific to the Homestarrunner universe, perhaps related to one of the main characters.
Grandma might know best about family history stories. For example, she could tell about how the family overcame difficulties during tough times like the Great Depression. She might also have stories of family traditions, like the special recipe that has been passed down for generations and the story behind it. And she could share stories of the family's immigration journey, if applicable.
Because they are full of wisdom. Grandma has lived a long life and has a lot of experiences. Her stories are like little gems of knowledge passed down through the generations.
Stories about brave knights and dragons are also very popular among little boys. Grandma could tell them about a knight who saved a princess from a big, scary dragon. She can describe the knight's shiny armor and the fierce battle with the dragon in detail, which would surely captivate the little boys.
The most common moral in grandma's stories was probably 'be kind'. In many of her tales, the characters who were kind-hearted ended up getting rewarded in some way, like finding true love or getting a fortune. For example, in the story of Cinderella, her kindness towards the animals led to them helping her go to the ball.
Huo Qishan's grandmother was Lu Yanni. Lu Yanni was the first wife of Huo Qishan's grandfather, Huo Yingdong. She had a high status in the Huo family and was respected and loved by her family. Huo Yingdong had set a rule in his early years, requiring everyone and everything to respect Lu Yanni and not to offend the eldest branch. The second and third household and their children were also not allowed to act in a high-profile manner to protect Lu Yanni's leadership position in the family. Lu Yanni's mind and mind were also praised. She even let Huo Yingdong marry Lin Shuduan, the Third Prince, because she took a fancy to Lin's business mind. All in all, Lu Yanni played an important role in the Huo family and was respected and loved by her family.