Q: What do you call a flower that runs on electricity? A: A power plant!\nWhat do you think is the punchline of the above joke?
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: