In this, the sixth book in the series, Grandpa and the children complete a small steam locomotive, and then find out how fast it can go. During the adventures on the little farm railway, they learn about railway speed records and the concept of mechanical power. Grandpa also tells the children more of his amazing-but-true stories.

The theme of the book is how much power it takes to go faster, with the simple physics of work and power being explained with stories and diagrams.

Hardback, 128 pages with 40 watercolour pictures.
There are 11 pages of simple technical drawings to explain, add interest and answer questions.

Age 6 to 12 years