There are some very decorative "boxes" one can build or buy for these bees to live in. Place it on the south side of a tree or house as they need the warmth from the sun to be able to fly.
Google "Mason Bees" for some interesting reading and surprise your friends with some "Entomological Wisdom."
Here is some information on a documentary about bees that is soon to be available at the Houston Museum of Fine Arts.
It is 91 minutes with show times on Wed, Oct 23 at 6:30 pm and Sun Oct 27 at 5 pm. See THIS LINK for details.. I believe there is a discussion period following the talk.
And if you are a fan of TED Talks... HERE IS a link that is in keeping with the theme of this post. As of today it has had over 414 thousand views since it was posted last month.
"Bee Good and Bee Well"