Steam Locomotive 3D Laser Cut Models These amazingly detailed models start as a 4\" (100mm) square steel sheets and finish as amazing 3D models. Use the easy to follow instructions to pop the pieces, bend the tabs, and connect them at the attachment points. Simple to follow instructions included. Suitable for ages 14+ Finished size: 10 x 23 x 30 mm The Steam Locomotive is a train that produces its power from a steam engine. The train must carry its water either in the locomotive itself or in an attached car behind the locomotive. The steam is produced by burning coal, wood or oil. Steam engines dominated railway transportation from the early 19th century through the middle of the 20th century.