Half the fun of a child's birthday party is the planning and preparation. We've played hosts and guests to many a fun affair and we're already thinking about what we'll do next year. We've been wracking our brains......and found this fun, and slightly grotesque, Mad Scientist-themed birthday party over at Nesting blog. We love the purple brain cake and the test tubes and beakers full of colorful juices. Check out their site for more pics from this fun party idea.