This simple fan is ideal as a first motorised project .
It can be built with:
1. A K'NEX Base kit
2. A K'NEX Battery motor (any colour)
... and finally fix the fan blade onto the top of the shaft, so that the pin of the tan interlocking clip fits into the white connector at the centre of the fan blade.
Your fan is now complete, and you can test it by switching on the motor.