Jesus, Thomas, and Spencer

So tonight Phillip and David were reading in the New Testament. They were reading about when Jesus choose his 12 disciples. It is on pg. 308 in the Beginners Bible, in case you want to follow along. When Phillip got to the page with the pictures of the disciples and their names, David asked, "where's Philip?" and Phillip pointed to Philip. Then David pointed to another disciple and asked "Who's this?" "Thomas"... at this point David was quiet for a moment and then sat up in bed and pointed at his toys and said "there's Thomas" (referring to Thomas the train) and laid back down. He then pointed at the picture of the disciples again and asked, "which one is Spencer?" (another train) Phillip couldn't stop laughing, but pulled himself back together to tell David there was not a disciple named Spencer. David asked again "Who's this?" Phillip said "James" (yet another train). Needless to say David is a little confused on how people (or trains) can share names.