When scribbling on paper doesn’t work, sometimes you can get a stuck ball moving by rubbing the pen on a rubber surface. Scribble on a rubber eraser or even the sole of your shoe. Alternatively, some people find it helpful to scribble on a glass surface (such as a hand mirror) to get a stuck ballpoint pen going again. Sometimes a ballpoint pen will stop writing because there’s a space or bubble between the ink in the cartridge and the nib. Hold the end of your pen opposite the nib and give the pen several firm shakes, as if you were shaking down an old-fashioned glass thermometer. When you’re done, give it a scribble to see if it works. You can also try tapping the pen firmly on a hard surface, like the edge of a desk or table. If your pen has a wide enough cartridge, you may be able to push the ink down toward the nib. Unscrew the barrel of your pen and take out the cartridge, then pull the cap off the end of the cartridge. Push a cotton swab into the cartridge and apply gentle pressure to the fluid inside. Put your pen back together and test it again.  If the cartridge is too narrow to fit a cotton swab in, use a smaller object, like a paperclip. If the cotton swab gets ink on it, toss it in the trash right away so that the ink doesn’t spread around and stain anything.
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One-sentence summary -- Scrape the nib on a rubber surface to get the ball rolling. Shake the pen to move the ink down in the cartridge. Push the ink down in a wide cartridge with a cotton swab.

Q: You'll download a Flash browser from here. The search bar is at the bottom of your screen, marked by a magnifying glass icon.  "Puffin", "Appsverse Photon", and "Photon Flash Video Player & Private Web Browser" are both well-received all-purpose Flash browsers for under $5.00.  "iSwifter Games Browser" is an app dedicated to Flash site gaming. Though the app itself is free, you'll have to pay $4.99 for unlimited access to its games. This begins the download process. Your download should commence.  It should be visible on one of your iPad's screens. If you don't see the app on your home screen, swipe right until you find it.
A: Tap the "App Store" app to open the app store. Type the name of the Flash browser you want into the app store search bar. Tap "GET" next to the app, then tap "INSTALL" when it appears. Enter your Apple ID password if necessary. Exit the app store. Ensure that the app downloaded properly.

Article: Because healthy guinea pigs eat so consistently, they also tend to keep a fairly consistent weight.  Unexplained, rapid weight gain or (especially) loss is always a cause for concern.  A weight fluctuation of one ounce (up or down) in a week is not cause for concern on its own. A weekly fluctuation of two ounces should raise your alert to any other signs of illness. A gain or drop of three ounces in a week is a “red alert” — contact your veterinarian. If the fluctuation is four ounces or more, seek immediate veterinary attention. Healthy guinea pigs should not normally have bald patches or skin that appears raw, cracked, or inflamed.  Examine your pet daily for changes in hair coverage or skin condition.  Infestation by mites or lice is unfortunately not uncommon for guinea pigs.  Watch for signs of hair loss and itching, as well as skin inflammation, especially near your pet's rear end. Ringworm (a skin infection) also often affects guinea pigs.  Watch for bald patches that often appear first on or near the head, and which reveal red, flaky skin. Any evidence of unusual hair loss or skin irritation/inflammation warrants a call to the vet. The older your guinea pig gets, the more likely it is to develop tumors.  Often these are benign, but they can also be a sign of cancer or another serious illness.  Regularly look and feel (gently) for any new bumps or protrusions, and contact the vet if you find any. Between one-sixth and one-third of all guinea pigs over age five will develop some sort of tumor.  Benign tumors can often be removed or ignored, while little can be done for most cancers.
Question: What is a summary of what this article is about?
Weigh your guinea pig at least weekly. Watch for hair loss and skin irritation. Check for tumors.

Article: . The most common tool for drawing in this style is a pencil. Pencils will allow you to easily lay down shadows and leave blank or erase areas for highlights. Pencils are easy to layer, giving you great control over the image you create. They also blend relatively well. Pencils come in different hardnesses (created by containing more or less graphite). The harder the pencil, the lighter the mark it will make. Use different pencils depending on how light or dark your lines need to be. Hard pencils will be labeled with an H and soft pencils with a B. The higher the number listed next to the letter, the more hard or soft the pencil is. A standard pencil, for example, is an HB. You can also use pens for creating realistic drawings. This will rely on highly accurate lines and proportions, as well as hatching, line variation, and etching style shadows. You can use any pen for this but you will have the best results with a nibbed or brush pen, as this will give you a better opportunity to change line widths. . You can use charcoal to create realistic drawings as well. Charcoal is perhaps the easiest drawing medium with which to create shadows and highlights, a crucial aspect of creating realistic drawings. Charcoal is easily smudged and blended, which can be used to your benefit but can also create difficulties. Drawing charcoal comes in a variety of shapes and sizes. Willow or vine charcoal is a nice middle ground, while charcoal pencils are great for doing details. Depending on what media you choose, you will need to be sure to get an appropriate type of paper. Charcoal especially will require paper designed for that medium (a heavily textured paper which gives the charcoal something to latch onto). Pencils will do better with smooth, rag paper since this will help with blending.  Be sure to look for acid-free, archival paper when available. This will keep your drawings from yellowing over time or otherwise aging badly. In addition to special paper, charcoal will require the use of a spray fixative to keep it from smudging once you are done creating your image. A drawing stump is a pencil-shaped roll of paper which is sanded to a point. This point is then used to blend charcoal or pencil, forming the soft gradient of shadows in your drawing. It will need to be sanded every time it becomes too covered in charcoal or graphite from your pencils. Stumps can be purchased or made by hand. An eraser is invaluable for removing mistakes and creating highlights. You can use a normal vinyl or rubber eraser for pencil or a kneaded eraser for charcoal. You can also use a kneaded eraser for pencils, as it can easily be molded into a sharp point to do detail erasing.
Question: What is a summary of what this article is about?
Use pencils Use pens. Use charcoal Use appropriate paper. Get a drawing stump. Get an eraser.