I went to see the Leonardo: 500 years into the Future exhibit at The Tech Museum in San Jose - 201 Market Street (across from the Fairmont and Caesar Chavez Park). I find this exhibit very entertaining, and Leonardo's designs are amazing. There are working models of Leonardo's work being displayed. There is a self guided tour and guided tour that starts every 15 minutes. Cost for adult is $25 ($3.00 discount for AAA members, $5.00 discount with student ID). The Leonardo admission includes admission to the general Tech Museum galleries. Did you know that Leonardo used worm gears, rack, pinion, and ball bearings in some of his designs? Has anyone attended this exhibit? What are your thoughts regarding this exhibit?