The train ride might appeal to them. It's not too far from the Railroad Pass Casino. You can call the number below to find out the 2006 schedule.

From the website:
http://dmla.clan.lib.nv.us/docs/dca/press/2005/02-28b.htm

EXCURSION train rides depart from the Nevada Southern Railway station (off Yucca Street) and travels 3.5 miles west along the historic Boulder Branch Line to Railroad Pass located within the River Mountains range. The round trip (7 miles) lasts approximately forty-five minutes in duration where passengers will be able ride in newly refurbished (air conditioned) Pullman Coaches dating back to 1911.

Nevada State Railroad Museum/Boulder City
600 Yucca Street
P.O. Box 62423
Boulder City, Nevada 89006-2423
Tel: (702) 486-5933 Fax: (702) 486-5901

Hope this helps.