If you ask A. what his favorite color is, he will name every color that he knows. I've decided to throw him a rainbow birthday party. Even though, only a few friends and family are invited, I couldn't resist, but still go big with the treats. First up are rainbow candy-ka-bobs. I went shopping for different colored candy that could be skewered on a stick. I found fruit slices and gumdrops were both colorful and yummy. I lined up the candy in different combinations, but following the rainbow…