Douglas and his brother Donald are twins. Sir Topham Hatt had only ordered one goods engine, but when both Donald and Douglas showed up he decided to keep them both. Donald and Douglas love to play practical jokes, especially impersonating one another. They were fitted with nameplates to specifically end this element of their humour.WARNING: This product can expose you to chemicals including LEAD, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov