VIDEO : Kim Kardashian Reveals a New Family Tradition in Honor of Her Late Father

Kim Kardashian has found a beautiful way to honor her late father, Robert. With a family photo and a sweet caption, Kim tweeted, "Happy Birthday dad! I love this family photo. I love our family. Thank you for EVERYTHING. I'm so grateful you are my dad!" As tradition, Robert used to write his children letters to remind them how much he loved them. Kim decided to implement the same plan for her and her children. "I write my kids a letter each year reflecting on the year we had together & fun memories. I'll give the letters to them when they turn 21," Kim said. What a surprise for North West and Saint West!