In all these experiments make use of the contacts between the blades of the Light Mill. It's easy when you attach a piece of flexible electrical wire here. Stick a piece of tape over the light sensor.

Color  the patches starts and  finish with a soft black pencil (preferably 6B). Slide the metal surfaces
paperclip on the  surfaces, connect the wires to the paper clips. Draw a path through the islands and bridges. If the path is well marked, without interruptions, the mill will run faster.

Lost your wire???
In a pile of wire ends it is sometimes difficult to find the acompanied ends. Try it with the LightMill!

Pak both the end of a wire of the Light Mill bite. Join hands, watching a good look at what happened!

Which materials conduct electricity? Try it with the Light Mill!

Connect different resistances between the wires. What can you say about the speed of the mill and the value of the resistor?