Two young Mammoth Islanders enlist the help of a visiting inventor to design a machine that will make the rides at the amusement park much more exciting. After observing the power in the expanding steam of a tea kettle, they decide to build a steam engine that would convert heat energy to mechanical energy that will power everything from spinning cotton candy to powering roller coasters.

Teacher's guide available under Additional info tag.

Based on the Dorling Kindersley book "The Way Things Work" by David Macaulay.