After pickup from your hotel in Cairns, board the Skyrail Rainforest Cableway for Kuranda. It's a spectacular aerial ride above the treetop canopy, with two optional stops to enjoy a guided walk through the rainforest or visit the CSIRO Interpretive Centre.
On arrival at your destination you'll have free time to do as much or as little as you like; perhaps shop in Kuranda's Heritage Markets, or grab a bite to eat in one of the many restaurants or cafes (own expense). Upgrade your experience to include a visit to Rainforestation Nature Park, or gain entry to Tjapukai Aboriginal Cultural Park (included buffet lunch here is optional).
If you'd like, enjoy a wildlife encounter at Birdworld, Australian Butterfly Sanctuary or Kuranda Koala Gardens (additional cost; payable direct).
Finish your day trip with a scenic rainforest journey aboard the Kuranda Scenic Railway back to Cairns, where you'll be dropped off at your hotel. Alternatively, you can travel 1-way to Kuranda by railway and return to Cairns by skyrail.