DD and I had a ball going out on Seven Seas Lagoon and Bay Lake in a small 2-person boat we rented from the marina at Poly (available at several resorts).
We loved Mickey’s Backyard BBQ when the kids were small, and now that they are older we have really enjoyed HDDR.
Caring for Giants is a great backstage tour about the elephants of AK that is brief and affordable. We loved it!
Marcelina to Main Street is a really interesting tour in MK about Walt’s life and how his experiences and relationships with people - personal and professional - influenced the creation of DL and eventually inspired WDW. Being 4 hours it won’t eat your whole day but goes enough in depth -and a little backstage - to be well worth the up charge. It was a fantastic way to spend the morning with a friend.
Thus far for us though, the greatest of the extras was been Wild Africa Trek which takes you in an up-close safari experience in AK. Private safari vehicle, trek through the “jungle”, walk on suspension bridge over the alligators, private large snack/small meal in a pavilion overlooking the savanna - it’s something we will never forget and while I thought it was pricey before we went, in the end I felt it was worth every penny.