A Ride On Toy:
Last year my daughter recevied the John Deere Ride On Gator. While I wasn't super keen on her getting a ride on toy, it's turned into one of her most prized possessions. She not only rides it around the yard, but she helps with gardening, and cleaning up the yard. It's great that she has a way to feel helpful, and it's great that now she drives weeds to the burn pile instead of me having to push them over in the wheel barrow.
A savings account:
This may not seem like a real gift, but what better way to begin preparing your child for the real world, than to get them started understanding money and how it works. Getting kids started working with and saving money from a young age will help them throughout their entire adult life. It will be a skill that will serve them well.
This isn't that unique, but it is certainly a great gift. You can always make it unique by setting up a treasure hunt, and each book that is found gives a clue to the next one. You could also set them up with a book of the month club or something similar, so each month they get a new book to read.
Hopefully that will give you some ideas for creative, learning gifts for your kiddo.