The Ninky Nonk is a train of five differently sized and shaped carriages. Its size is non-euclidean: exterior shots of the moving Ninky Nonk show a toy-sized train, quite small compared to the main characters and scenery, while interiors and static exterior shots are done on sets or with life-sized models so that the main characters can easily fit inside. When it stops or starts, the seat-belted passengers jerk sharply in their seats, and the ride is often described as "bumpy". Bells and green lights warn everyone inside when the Ninky Nonk is ready to depart. The Ninky Nonk can drive up and down trees and upside-down along branches. Like the other characters, it goes to sleep. The engine is banana-shaped with a green flashing light on top, and is followed by a green spheroidal carriage used by the Tombliboos and Makka Pakka, a tiny house-like carriage used by the Pontipines and Wottingers, a blue rectangular carriage used by Upsy Daisy and Igglepiggle (when he is travelling with Upsy Daisy), and a tall rounded single-seater carriage used by Iggle Piggle when he is travelling alone. All the carriages have lights on top that flash in sequence when the Ninky Nonk is stationary. It was first featured in the episode "Everybody, All Aboard the Ninky Nonk".