The route crate is supposed to roll. Not race. World Two is hot, bright, and built to move. Ramps tilt. Platforms slide. Switches count down. Crates do not wait politely while builders argue. Patch Bolt is sure the Sand Canyon route can be fixed with one clean plan. Then a wrong switch sends a crate racing down the rail line and shakes loose a boulder path beneath the canyon. With Dusty Gear, Sandy Switch, Tumblebot, Pebble Pete, and Cactus Jackbot watching, Patch must learn that measuring is only the start. The path has timing. And timing means listening while the build moves. The Gadget Sandbox is alive in Sand Canyon. The team is about to find out what that means. Book Two of The Gadget Sandbox Chronicles. For readers ages 10 and up who measure twice and listen once. Includes a complete Sandbox Glossary covering Sand Canyon's NPCs, mechanics, the boulder line, and Rule Two.