Catholic Train?

Finn went to Catechesis of the Good Shepherd yesterday. They get on the kids when they are not doing the works. Finn has a habit of drawing pictures of whatever he pleases...  Yesterday he showed me 3 pictures of trains he drew. I started to ask if it was okay with his teachers, when he stopped me by saying. "I told Jo, don't worry about it... The train is carrying crucifixes and chalices!"  Ha! I think that was the end of that...