railroad ring for L1 rocket...
The high-quality marble machine with its 8 constantly moving marbles evokes universal amazement!
Böhms entry into the world of marble machines is a real eye-catcher for both young and old; follow the 8 marbles in the tornado loop, be amazed by the marble machine!
HB5 motor is NOT part of the delivery but can be ordered additionally!
Our Roll-1 can be driven by every stirling engine, too! The best option is our HB5 - Powerplant.