Sometimes the BOGO deal excludes the water park. Don’t cry. That just means you’ll spend more time in the Lego Factory Tour. You watch bricks get made. It’s hypnotic. And you and your free friend can guess which color comes next.
Also, the deal usually requires online purchase. If you show up at the gate asking for BOGO, they’ll think you’re speaking a strange dialect. Don’t do that. Plan ahead.