How to Tinker the Rails in "Viva Pinata"
- 1). Open the menu and select "Village." Choose "Bart's Exchange" to visit the tinkerer.
- 2). Select the option to unblock the Ponocky, which appears next to the normal Bronze, Silver and Gold cost options.
- 3). Exit the menu to go back to the garden. You'll see Bart go to the railings blocking the Ponocky and change them into candy canes.
Source...