article_snippet: "I want one of these robot arms!"
article_snippet: The organization creates and shares bionic arm designs for free download at EnablingTheFuture.org that can be assembled for as little as $20 to $50.
article_snippet: Most 3-D arms are mechanical, which presents a challenge for children without elbows.
article_snippet: With mechanical arms, the child opens and closes their hand by bending their elbow.
article_snippet: The students came up with the idea for an electronic arm with a muscle sensor that allows the child to open and close The students hand by flexing The students bicep.
article_snippet: The first problem we solved was: how do we make the hand move electronically?
article_snippet: Each electronic limb takes about 30 to 50 hours to make and assemble.