- 2000 (Clickity-Clack Track)
- 2002 (Traction Rail)
- 2011 (New artwork, includes Salty, Toys R Us Exclusive)
- 2013 (New artwork and red knob)
- Zoo Drawbridge from Thomas at the Zoo Set (2008).
- The prototype 2011 Drawbridge has blue railings instead of green ones.