Marble Track

Marble Track can be made from the DUPLO Tubes and Balls.
It can use large MindStorms links.  Many kinds of motors can work

including the NXT MindStorms motor.
The motor can be run from battery box or NXT, RCX, or WeDo tm

Elevator can also be made from the Simple Motorized Machine set.
Elevator can also be made with chain links. Motion can be programmed with WeDo tm

LEGO  Links of Linda Hamilton hamilton@marshall.edu