1.
sugarglider.info/diet/unsafe-foods/
This page has some DO NOT FEED foods. Also, NO HEAT ROCK.
2. several sites have this.
www.sugar-gliders.com/glidervet-60.htm
this place has a short list, but googling I have found sites with much bigger lists, some bird sites have a list if I remember correctly.
3. "canned" is basicly a NO NO (sugar/additives). but freezed dried mealworms come in bag or bucket. and yogurt treats come in bag. fruit treats best if FRESH, but I get dried papaya from petstore NO ADDITIVES (no sugar!!!) but after some mealworms gliders start to skip the papaya, but still like yogurts drops. Just keep treats in the sometimes list.
4. we feed HPW, BML is used alot. Diet is a more difficult one, you do want to feed them healthy, but think of it this way, in the wild gliders live much shorter lives because of predators and starvation. So if you put in a good faith effort on a good diet and keep reading to learn more about the diet you are on the right track, I don't believe in the feed them this diet or else. but to pick a poor diet and not learn if a better diet is available can be bad to. In the wild a gliders problem is starvation! not which berry passes the taste test. <--this information comes from a book. animal planet Sugar Gliders by david e boruchowitz 2012 discovery communications, LLC. this book seemed well balanced on the information.
example: pellets bad never feed, but wait, cereal is different somewhat and cereal good for cleaning teeth. so i leave a small amount in cage of pro-pets cereal in cage, freeze unused to keep fresh and replace every few days as cereal can mold which is bad.
5. wiffle ball with fleece strips are enjoyed by the gliders. "shopkins" kids toy baskets make excellent foraging cups, just the blue cups the rest we dont use.
6. don't know, they come from down under, you could check the humidity levels there, but have never hurt of this mattering yet.