Why don't they put petals on wheelchairs so when our arms get tired, we just use our legs?
Petal Powered Wheelchairs
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Explanation
Experiment
Explain Bear
Listen here, smartie. People who are using wheelchairs can't use their legs because they are usually paralyzed from the waist down. I know, I know, big words for a little brain like yours. What do you think I am, a medical textbook? Now go back to your coloring book, before you hurt yourself.