me & my fiance have done some of the wdw tours, which we have enjoyed.
we did the dolphins in depth tour at epcot. we were educated on marine dolphins & even got in the water with them & assisted with tricks, one of our favorite pictures is us in our wetsuits with rainer, the dolphin. the photo, a tshirt & info packet was included in the 3 hour tour at epcot which was $110/pp with a birnbaums coupon. we also did the backstage safari tour at animal kingdom which gave a behind the scenes look at the animal care & veterinary facilities, & an up close view of the animals, it was an amazing tour, it was $65/pp & included a pin, snacks & upclose animals at ak.
i also did the backstage magic tour with my mom years back which we really enjoyed, it was like 8 hours & included the underground tunnel tour of wdw, lunch & some character meets.
under waltdisneyworld.com each parks main page has a link to the park tours with descriptions & prices.