Grab the colorful puzzle pieces and place them together to fill up the train cars. The more you fill up the car, the more of the picture you get to see. Click on the puzzle pieces from the conveyor belt to pick them up and place them in the trains by clicking again. Use the space bar to rotate the puzzle pieces. Use single pieces from the bottom left corner to fill small spaces. If you can't make a piece fit, you can drop it in the gift return.

The Holiday Express game on this site works the same and is especially for the holidays!