Ravensburger GraviTrax: Jumper Accessory| STEM Toy for Kids Ages 8 and Up | Compatible with All GraviTrax Systems | Ranked No.1 Marble Run System in The U.S
| Country | USA |
| Brand | Routledge |
| Manufacturer | Routledge |
| Binding | Paperback |
| ItemPartNumber | 2 Line drawings, black and white; 2 Half |
| ReleaseDate | 2018-09-06 |
| UnitCount | 1 |
| EANs | 9781138215788 |