Well crying isn't bad, crying is a way of letting go and being emotional. Sometimes it's part of the healing process. So, don't be afraid of the crying. But please, again, treat them like anyone who is need. Listening is the best gift that you can give to someone.
Healing is part of that.
More than that, there are things like planting a tree, planting a bush, a rosebush, a lot of people like to do that. Writing a letter and sending it off as a balloon. Writing a letter and putting it in a book. One of the things when someone dies is if people would write letters to them remembering that person, and then they can keep them and read them later. But there are wonderful memorials to that person.