Here's our take on a yellow submarine car. Built/assembled the model kit and mounted it (with magnets) to a well car:
Scooby-Doo, painted for my daughter when she was in the middle of a Scooby phase:
A dragon transport car I made to go with our Hogwarts Express:
P-51 transport car. This one was actually my first ever "kitbash" attempt... Lots I would do different today, but still a fun piece:
McQueen and Mater... this one was for my kids' "Cars" phase while running trains at the club:
Coyote and Roadrunner:
...and speaking of Acme, here is my high-powered magnet car. Works really, really well for clearing the tracks of small metal debris:
The magnet lifts out from the top, allowing all the accumulated debris (clinging to the underside of the car) to fall into a trash can:
...and, of course, on our layout Thomas blew-off his responsibilities one too many times. He now stands as a reminder to other engines to be really useful: