Wedding Shower for Molly

i know that the Maid of honour is the girl responsible for giving the Bride a shower. But in Molly's case that means Anna and since she is only 14 she does not have much experience. So i will be doing a lot of the brainstorming and organizing Molly's shower. i realize that it isn't correct etiquette for the mother of the bride to be giving the shower so i will be HELPING Anna through this fun day for Molly. Since the last shower i gave was 27 years ago, i am really clueless. i have spent most of the day reading on line about all that is involved. Theme, favors, decorations, menu and games. Where i am struggling is the theme. If any of you have any ideas or suggestions i would so appreciate it. Thank-you all....t