My partner, Greg, was a widower. His daughter, Megan, was 9 when her mom died. Greg died when Megan was 14 and I've raised her as my own.
We'd talk about Greg. As time went by, it was good memories we revisited and laughed over. When she was 16 she candidly told me that she was glad we talked about her daddy. She added she and her daddy almost never spoke about her mother and she regretted how much she couldn't remember. Sharing the good memories helps us both remember how much fun we had with the big guy.
Maybe the pictures bring you down, but sharing memories and stories will help your kids.