RBBB 201
 
Warren flatcar (RBB&B 201).  The model consists of a Micro-Trains circus flatcar painted and decorated with Circus City decals, riding on Atlas Barber S2A trucks and ESM metal wheels. 

The first three wagons are stock Micro-Trains models.

The Two-Jesters calliope wagon #124 has a 3D-printed body and is fitted with Micro-Trains wheels and detail parts.