Q: What do you call a flower that runs on electricity?
A: A power plant!

Explanation: A power plant is a place where electricity is made.  There are many different types of power plants.

A flower is the part of a plant that makes the seeds.  Flowers and plants get their energy from the sun using photosynthesis. (Does not make them solar powered?  I am not sure.)  Plants are important to life on earth because we get oxygen and food from them.

This joke is funny because it plays with the word plant: electric plant and a living plant with flowers.

Here are four projects you can make with a mini solar panel: