Unaware of his dad's operation providence, Alex was still accompanying Lilitth walking around the amusement park. Well at this point it looked like it was Rachel and Evangeline accompanying Lilitth, while Alex was just there to hold the huge teddy bear.
The group had already tried almost every possible ride that allowed Lilitth and Niki to ride. The only ride left was the carrousel which didn't have much of a line. Alex who saw the carrousel was having a hard time understanding how that would be a fun ride.
Actually throughout the entirety of their trip in the amusement park, Alex was never truly amused. The haunted house had too much flaws if there purpose was to surprise and frighten. The ferris wheel was just them going up to see a better view of the city, which was not as good as looking down from a fighter jet. The other attractions were the same as they just couldn't amuse him.