The protagonist took his son to the museum on the magical night of the museum 1. Why didn't those wax figures come back to life?

Because the energy that revived the exhibits in the museum was stolen. There is an ancient Egyptian gold medal in the museum, which is amazing. At night, it will revive the exhibits and make the old people regain their youth. The original security guards in the museum are old and want to retire, but they are infatuated with the feeling of regaining their youth and secretly steal the gold medal. Larry didn't know, so this happened.