When a Bubbie, Zaide or parent passes away, it does not have to signify a lost connection. Holy actions done in their merit create an appropriate iluy neshama/elevation for the soul above and even stronger association and protection for the family left below.
You can now provide those merits. Thus, their true reward is in your power when you sponsor a day of communal learning* in their honor.

*The day includes all the tzedakah, prayers and learning of that day.
**Can also be done for birthdays and anniversaries