Thank you @agmoore for the condolence 😊. Putting the memories on a paper is indeed a good idea. It's even more personal than taking pictures. Maybe I'd try that out.

At least your daughter got to spend some precious time with him.

That's true. It was good that he had spent few quality days with his only granddaughter happily.
It seems that those days gave quite a big impression in my daughter's heart, cos she was also very sad and cried when I told her that her grandpa passed away.