I'm glad to see that the end of the movie series hasn't dampened the enthusiasm of the HP fans out there. The books will be read and re-read and cherished forever, mark my words.
Normally I'd scream overkill at a cake this busy but there is some amazing balance going on here. A striped rainbow heart inside a striped rainbow cake? A rainbow of fondant sprinkles so perfect they must have been placed there by very patient elves? I swoon for this kind of overkill.