Rumble of the coaster ghost

Alexander's class is going on a field trip to an amusement park. Everyone is excited -- until they find out they're going to SAFETY Land! Before the students take a ride on the Slow and Steady Teacups, a weird magician tells them there's a haunted roller coaster at the park. And Alexander starts seeing odd scratch marks all over the place. Is there REALLY a ghost at Safety Land?