tramcar trev
all manner of mechanical apparatus...
These are still popular ;
http://www.ebay.com.au/itm/251419269325?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
http://www.ebay.com.au/itm/251419269325?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649