Cute photo and idea, but Titus would be eating dirt with the cake.... yuck. :b I'd need a blanket. :)
When you've got a particular event, try shooting it like a series. Get a range of details—the setting, the food, the garland, close-ups of sticky fingers, toes in sand, the whole scene from a ways back, and close-up head-and-shoulder portraits. To tell the story visually, mix it up.