Lego party:  We did this for my son's 6th birthday party.  We had Lego candies (both hard and gummi) bought in bulk along with Lego pieces as favors, and I made a giant Lego cake using half-sized sheet cake pans and cupcake tins.  I cut the tops off of the cupcakes and turned them upside-down on top of the sheet cakes after frosting all of them with vanilla icing colored with lots of food coloring!  I did one cake with cupcake "pegs" in each: yellow, blue and red and laid them together as one big cake!  We had a Lego building contest and it was a lot of fun. I hope I can top this for all future parties!!