Slot Seed - In the first freight car on the left side prior to moving the box. It's a flashing object on the floor
Goddess Medicine - After going through the first 3 cars (These are the first set you start on with a box puzzle in the middle) you will come up to 2 more joined cars. The first car contains a box puzzle again and the chest will is hidden behind a box. The box is on the right at the end of the cart.