The IEC Solar Energy Fan is an excellent unit for demonstrating solar.
It consists of a small base with a solar generator, connected to a motor and fan. Switches permit on/off and reversal of the motor direction.
A cowl is fitted around the fan to avoid damage during use or storage. Designed strong for student use.
The fan runs well under direct sunlight and also by bright incandescent light. See IECs new 12V. 20W Microscope lamp using a reflector lamp LB2162-001.