I'm new to wood working and I want to build my wife a bathtub tray that can hold a laptop (for Hulu watching) and a glass. It doesn't need to hold anything else really. But I don't know what type of wood to use for this. What wood would be good?!
Teak, finished with tung oil, is beautiful and very humidity-resistant. It is, however, insanely hard to work with. Same for mahogany.
Another option would be any tight-grain, dimensionally stable hardwood, like cherry or birch, and finish with a marine-grade urethane spar varnish. This is a bit more work than normal wood finishing, but the results are beautiful and very humidity/water resistant. The varnish is available from boat supply stores, and the keyword to google the technique to apply it is "brightwork" - the art of finishing woodwork for marine applications.