Fifth graders know that renewable sources of energy such as wind and solar energy will be around long after coal or other fossil fuels are used up. They also know that renewable energy has its challenges. Here they are using wind generators and solar cells to power motors and lights.
Not enough wind...have to run to make enough electricity to light the bulb.
Getting the right angle helps get electrons flowing.
Too cloudy for solar cells. Too still for wind. Time to run.