31 Combinations in the Machines category:
| 1. Active Robot |
| 2. Assembly Line |
| 3. Atom Bomb |
| 4. Caterpillar Platform |
| 5. Chainsaw |
| 6. Drilling Rig |
| 7. Electric Boiler |
| 8. Electronic Clock |
| 9. Freezer |
| 10. Gear |
| 11. Incomplete Boiler |
| 12. Incomplete Mechanism |
| 13. Internal Combustion Engine |
| 14. Irrigation System |
| 15. Jack Pump |
| 16. Jet Engine |
| 17. Loom |
| 18. Mechanical Clock |
| 19. Noria |
| 20. Nuclear Boiler |
| 21. Potter’s Wheel |
| 22. Powersaw Bench |
| 23. Pump |
| 24. Robot |
| 25. Steam Engine |
| 26. Steam Turbine |
| 27. Ufo |
| 28. Water Turbine |
| 29. Water Wheel |
| 30. Wheel |
| 31. Wind Turbine |