Mechanical energy
Riding a bike or lighting a fire?
What is riding a bike?
a campfire or a seesaw?
What is a campfire?
A loud plane or a car?
What is a loud plane?
freezing ice or a swing?
What is a swing?
Energy inside a battery or a robot?
What is energy inside a battery?
A turned off microphone or a music box?
What is a music box?
eating an apple or hitting a baseball?
What is hitting a baseball?
Photosynthesis or a loud speaker?
What is Photosynthesis?