They're the rascals of Sir Topham Hatt's railway—they take great delight in causing trouble for whichever engine has to pull them. Press the button on top of the tarp to hear phrases and giggles! See the trucks rock back and forth as you roll them on the tracks. The Giggling Troublesome Trucks can connect to other Wooden Railway engines and vehicles with magnet connectors. Perfect for Thomas & Friends™ Wooden Railway sets!