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The arms that come with Spidermom are made completely of recycled materials. The arms are metal on the inside for durability but are coated with a skin-like material. The arms attach to the backpack, not the person, for convenience. They can be removed at any time. The backpack has a battery pack and a control panel (voice operated) for controlling the arms. Once the arms have performed a task once, the control panel remembers how to do the task and it does not need to be re-entered. Before putting the backpack on, you enter what function the arms will be performing. After putting the backpack on, you simply tell the arms when to begin the task and guide them as they go if necessary. When you are ready to remove Spidermom, you tell the arms to retract and then take the backpack off and shut everything down to charge.

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In Drawing 4, the hands can be detached. The shape of the backpack has changed again to allow the arms to extend easier. The arms can expand and retract.

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In Drawing 3, the new design includes two retractable and flexible arms. This improves the design because now the size of the arms can be adjusted when used. The arms can retract completely until needed. This design also includes hands with usable fingers.

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The original drawing consists of a regular sized backpack with two arms attached to it. These arms are metal on the inside and a skin-like outer material.

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I don't know a single mother or stay at home parent who doesn't wish for a second set of arms! 2 arms is just not enough. The spider does not have an extra set of arms but it does have 3 extra sets of legs (limbs). An extra set of arms can help with multi-tasking. You can wash dishes and cook at the same time or just cook multiple things at one time more successfully. You can brush your teeth and comb your hair at the same time or carry a baby safely while also finishing up work on a laptop. With this extra set of arms, you can also reach items that are farther away because this new set of arms can retract and expand. Each arm can reach farther than your actual arm length. A second set of arms can also take over the dirty work that sometimes comes along with being a human. This new set of arms can now be in charge of cleaning the toilet, blowing your nose, or changing diapers. This means less stress and more sanity

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The original size and shape of the backpack was too bulky. This drawing includes a smaller, diamond-shaped backpack for easier use. It is less heavy and takes up less space.

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Here the 7 joints of a spider's leg are labeled.

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Although spiders are creepy, to most of us, they have many features and abilities that would be advantageous if possessed by humans. Spiders are also called Arthropods which means they are "joint footed". This basically means that spiders do not have any bones or an internal skeleton (this is probably why it is so easy to stomp on most of them). Spdiers do have an exoskeleton which is their hard outer skeleton. Even though there are about 40, 000 types of spiders all around the world, they all share some similar features. These features include 4 sets of eyes, the ability to produce a strong silky material to create webs, and they all have 8 legs. Unlike humans, who only have 1 major joint per limb, each individual leg on the spider has seven joints. This means they can move their limbs in very different and unique ways. Spiders are able to move their legs due to hydraulic pressure. This is necessary because their legs lack internal bones which is why their legs do not move the same way human legs do.

Resources:
http://infinitespider.com/spider-legs-work/

http://www.livescience.com/22122-types-of-spiders.html