A New Train?

We are trying to get Krista trained for use of the big girl bathroom and hopefully soon lose the pull ups. (You all know what I mean!) Gala and Krista were having a chat about this and what mommy and daddy expect when she potty trains.....when Reece yelled, "I want to see the potty train".
Uhm......I wonder what THAT train would look like. Any suggestions?