Sugar gliders are marsupials, which means they have a pouch. However, unlike a kangaroo whose pouch runs horizontal, a female glider's pouch runs vertically up her belly. They are native to Australia and Indonesia, and can live as long as 15 years in captivity. Sugar gliders are also nocturnal, meaning they sleep during the day and are active at night. This doesn't mean that they can't adjust to a more diurnal, or daytime schedule, if necessary, though. They are also omnivores, which means they eat everything. Fruits, veggies, bugs, meat, bread, grains, and even America's favorite food group- junk, are all included, as well as yogurts and cottage cheese. The most important factor in owning a glider is meeting their extensive diet needs. If you are not prepared to do that you should not purchase a glider as a pet. More on glider diet info.
If you have just purchased or are thinking of purchasing a glider you need to know that it will take some time and even persistence for your glider to become totally comfortable with you. Some ways to speed up this process are by offering it food (especially peanuts or a yummy treat like cake donut) every time you stick your hand in it's cage. After it takes the food you should proceed to pet it, even if it's only for a second. Another trick is to put a freshly worn sock in the nesting box with your glider, so that it can quickly become familiar and comfortable with your scent. For a new baby glider try putting a blanket in your lap, bunching it to create folds, and then place the baby on the blanket. Usually, they will crawl into a fold and stay. This will allow you to get your new pet used to being out with you, while allowing you to see where your baby is and pet it freely. Eventually your glider will get used to your smell and associate you with food, and then it will realize you're not its enemy and think of you as a friend. So, just be patient. Your glider will not bond with you instantly, but once it does, once it recognizes your smell, you will be on your way to a wonderful friendship.
When you first bring your glider home, you will be a stranger to it. It will probably make a loud scary noise, called charring, at you that will make you jump back, which is exactly what it was intended for, and in desperation, or if you are trapping it between your hands so that it can't move, (they don't like that & you shouldn't do it.) it might even nip you. Don't be frightened or alarmed at this. It's just saying it's scared and doesn't know you. If you run away from it, it will continue to do this to you every time you stick your hand in its cage, but if you ignore it and go ahead and pet it anyway, it will, after a short time, give up trying to get rid of you. This is especially important of gliders that nip. You just have to pretend they are not biting you. Do not react to there bites in any way. Just keep petting them as though they are not doing it. They will stop, if you do. Their mouths are very small so they usually do not break the skin, but sometimes it can still hurt. If they've been handled well they probably won't bite very hard at all, but it still scares you. Just remember not to react in either situation.
However having said all that, where you buy your glider from is just as important as how you handle it once you have it. Obviously, if a person has 100 gliders with babies in a shed behind his house, he can't possibly have time to handle all those babies to make sure they are pet ready and people friendly. What you get is a wild, frightened little glider that will bite HARD every time you try to touch it. It can be rehabilitated, as mentioned above, but it will be a slow, painful road. It is best you get your glider from someone who has only a few gliders, or who has a pair or two with the occasional set of babies, that way you know they have the time to work with them, to hand feed and hand tame them. Someone whose gliders actually live in their home with them or a truly dedicated breeder. Just make sure you put that breeder to the test. You can tell if a glider has been hand raised very easily. No matter where you get it from, you should be able to hold it. Because you are a stranger to it, it might make a noise and even gently, not painfully, nip at you for the initial passover from hand to hand, but if you remain calm, it should stop quickly and simply crawl around on you, quietly, sniffing and exploring. It should not flip over on its back making noise at you, dive into the floor, or latch on to your finger and not let go. It should not make noise at you constantly. All these things are signs that the glider has not been handled enough and may need significant work to tame. Beware of people selling baby gliders for very cheap prices- that is usually a dead giveaway that they aren't friendly. Take the time to talk to the person you are buying from. Make sure they are knowledgeable about the animal and that they themselves are friendly. All these things will help ensure you receive a pet and not a product.
This information is not a substitute for a real book on sugar gliders, which contains significant amounts of information. I highly recommend purchasing a book for your glider if you don't already have one.