These tools replace the missing body part. They help people walk. They help people lift things. They help people write.
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In the Know
Can You Hoop?
You push the toy hoop with your hips. At the … read more
In the Know
The Case of the Extra Hour
It comes from the end of Daylight Saving Time. Every … read more
In the Know
How Voting Works
What does it mean to vote? Who can vote? People … read more