How Do You Do The Train Switcheroo Problem?

Train switcheroo answer

my daughter solved this

car a moves to left upper track

car b poves to right upper track (engine barn area)

car a is pulled down to car b site

engine goes through tunnel

getting car b pushing to car a on the b site

wrap around clockwise through tunnel

push cars b-a together up to the left upper track\

leave car b there

pull car a back down to the b site

circle around counterclockwise to get engine between car b on the top left and car a on bottom left (at car b original parking site)

grab the b car in the left upper track

backing down the car b

then pushing car b around clockwise to the original car a parking site

dropping car a there

back up the engine to the engine garage (top right)