For all of you work-a-holics, I love Office Playground. It's full of fun, fairly inexpensive stuff for your office. I ordered a Zen Garden from them for Blake's birthday in June, and we are very happy with our "zen." :) Blake is much better at creating it than me, but it really works at relieving stress!
They also sell fun things that I haven't seen since my childhood, but I would love to play with for awhile again. Example: the beloved Barrel of Monkeys!