A popular theme that works well for either a boy or a girl is a clown or other circus_related cake. They are usually very bright and colorful, which makes for instant attraction and a great focal point for a party table.
Birthday Cakes For Girls _ For a little girl you might consider making a princess, fairy, or mermaid cake, or a cake that is dedicated to their favorite doll or toy. Another option is to have a bakery turn a photograph of your child into an edible image and use that as a part of the cake's main decoration. When little ones see themselves on a cake, it always attracts their attention and brings many a grin, not to mention constantly sneaking peeks at themselves.