Themes that have drop down menu

Hello,

First, I like my theme, “Rockers Theme” http://wordpress.org/themes/rockers… I tried setting setting up a parent/ child deal between 2 pages, I made the “child” a sub item, and it disappeared from my home page tabs… and no drop down menu for “about”… so maybe the theme can’t do it… I tried doing a google search for wordpress themes that do have navigation bars… Can anyone either A- tell me how to get a drop down nav bar in my current theme or reccommend some good themes that definitely do?

Thanks.
Jeff