Image via Wikipedia
Does your child have train on the brain? Stop in at Knoxville Center for a ride on the train for only $1. Yeah, it requires a stop at (gasp) the mall, but it's well worth it. My toddler was still talking about it the next day.
(West Town unfortunately doesn't have a train.)
For more train fun, visit UT Garden's Holiday Express, a 4,000 square ft miniture garden railway. The railway depicts East Tennessee railway history from the 1930's to present day.
Cost is $5/person. Visit UT Gardens for more information.