The Nevada Southern Railway Museum in Boulder City offers train rides in old Pullman coaches every Saturday and Sunday (with modern air conditioning during the summer). Trips go to the Railroad Pass Casino and back, taking about 35 minutes.
Departures are at 10:00, 11:30, 1:00, and 2:30, with booarding starting 15 minutes before departure. Tickets are $10, $5 for ages 4-11, free for those under 3.
They can use volunteers.