Gender Reveal Party/ Baby Shower. This would be great for having the guys participate, too. People wear the color of their vote for what gender the baby will be. The cake color reveals what the baby will be!
These Gender Reveal Cupcakes have pink, blue, and white swirled frosting on top that hides the secret colored heart in the center of the cupcake revealing the baby's gender when you bite into it! (Step-by-Step Photo Tutorial)