I am trying to decide what to do for my DS's 4th birthday party next weekend. He first said he wanted tractors, then it kind of turned into John Deere tractors, but now it is trucks. Anyway I could do a combo of those-trying to figure out how to come up with ideas? What color scheme should I go with for tableware, decorations? What should I do for his cake? Anyone have any good ideas of putting this all together for his party? Thanks!!