I made my youngest son a LEGO version of the Spencer train from the Thomas videos they watch all the time.  I based it off of one of the diecast metal trains, otherwise it would have ended up looking a bit different, especially the coal tender.  I had to build this one a little sturdy to withstand some serious shoving around.  When he gets older, I’ll fill the tender with the little round black pieces to look better.  This is what I was going for, and this is what I ended up with: