These kinds of conversations have also been some of our peak parenting moments. Our daughter's first crush, at age 2, was Luke Skywalker. We privately questioned her taste (Luke vs. Han? No contest!) but kept those thoughts to ourselves because we were so happy she was on her way to geekdom.

When our daughter was a baby, she had a t-shirt that all the adults adored: white with a small green pair of glasses and the word "nerdling." (She went to day care in Mountain View, CA. Geekdom is the town religion.) I really wish we could find another one, now that she is five and the Nerdling shirt has long since gone into the "Doesn't fit, can't bear to give it away" box. We bought it from a vendor at MakerFaire (no surprise there either) and have never seen another. I hope one comes your way for your nephew.