The show featured extensive use of slapstick, often performed using sped-up photography and clever, though low-budget, visual effects, such as when they built a railway station together and awoke the next morning to discover that some construction equipment outside (steam shovel, bulldozer, backhoe) had come to life and were lumbering, growling, and battling like dinosaurs. One episode featured them setting up a fake railway crossing as part of the plot, only to have an actual train pass through at high speed. This stunt was revealed to consist of a lorry with a mocked up railway engine attached to its side passing behind them, combined with separate footage of an express train. They also used film editing to realize the "portable hole" device seen in cartoons, where a black circle placed on the ground becomes a hole that characters can disappear into or appear out of, followed by the hole being picked up and carried away.