If you go to St. Louis, make sure to visit the City Museum (<a href="http:&#x2F;&#x2F;www.citymuseum.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.citymuseum.org&#x2F;</a>).  It is an incredible, unique playground to explore for children and adults alike.  It is hard to explain what it is and explanations don&#x27;t do it justice. To this day it is our fondest memory from the trip to St. Louis.