Sometimes, I like to take an official LEGO set and ignore the instructions to see what I can come up with. Here's a steam locomotive made of some parts in 60052. :
I rebuilt 60052 into a different train with different cargo and vehicles, using only parts from the original set (excluding extras). I'll share the instructions at some point, and maybe try another
LEGO CITY 60052 TRAINS ~ CARGO TRAIN with INSTRUCTIONS ~ RUNS GREAT!!! | eBay
Cargo Train City with RC LEPIN 02008 compatible 60052 - My Building Blocks Shop