You don't get a reward, it will just unlock the next quest in the chain. The last quest is called The Egg Hunt Finale. Are you sure you don't have another quest to do?
Disregard, I have noticed an issue where the final quest was not reset for those who have done the quest already, and will try to fix this in the upcoming Server Check.
That will need to be dealt with separately. Can you please confirm if you have access to The Egg Hunt Finale quest now?
