So, some friends are getting married and in lieu of gifts, they have asked for guests to do random acts of kindness And to tell them about it.

The wedding is rapidly approaching, and I am stuck for a good idea. Info about the couple: they work in IT. I have known the guy since University. They also have a booth they take to pirate fests, Ren faires, and Sci Fi conventions. She is a girl guide leader. Both are big readers. They have 2 cats and a dog.

Any ideas?