First, to: Fairygirl and Trina, I love your cages you guys made. They are both interesting and cleverly designed with the doors/access. You both have very lucky gliders!
About cage accessories:
Although the mesh accessories are neat, I don't recommend a full set of them. It's better to have a fleece set, then add one to a few pieces of mesh accessories. It's also nice to be able to used different arrangements from time to time. Most gliders prefer the privacy and warmth of fleece accessories, but the mesh gives them a different option for change, both if using mesh at all should be available in the cage.
I read you have your wheel and diners already, good start. You would definitely need either two water bottles or one or two good water silos, I use these in regular size. You can have two, but since they can't fail as long as they contain water, you don't have to have two, I just use one. http://www.petsmart.com/bird/bowls-feeders/insight-clean-water-silo-bird-waterer-zid36-14115/cat-36-catid-400014?var_id=36-14115&_t=pfm%3Dcategory
They are easier to clean than water bottles.
Now, moving on to toys and accessories: I know I've seen lists around, but can't locate any atm. I will try to list some basics, but also, look at the cage photos in this thread and see what other's have in their cages.
1. There are some items that aren't best to be kept in cages with gliders, including rope, if using a rope item, please, inspect daily for any fraying, as these can pose danger to suggie nails and toes.
2. Make sure your wheel is a suggie safe wheel, while other types of wheels are good for some pets, the suggie anatomy requires a more particular design to be considered safer, s/a no axle or pin holding it together.
3. Artificial (silk) plants, flowers and vines can be used safely as long as they do not have wire.
4. There are many hanging toys that are made and sold by vendors, but if you're crafty, you may enjoy creating your own. I do, but I've purchased a few here and there. There are two types of these toys: Foraging, which have a cup or something that can hold food and treats. Reset, which are toys that can be pulled apart by the gliders during the nigh, and reset by you in the morning. Mine seem to love toys they can pull out and toss about the cage ( stringing or hanging monkeys in a barrel and pom poms in a hanging container are among favs in my cage, but they like pulling straws out of wiffle balls or braided fleece also). You can look at these toys in photos of cages and there are a few threads around on just toys, you will get plenty good ideas from those. Also look at vendors that sell toy making supplies, that will give you a good idea of what you can use. Some items can be purchased at various dollar stores and some craft stores.
5. Floor toys: and sometimes these can be fixed higher up in cages, but generally more often on floor. Toy bins or Ball pits, these are popular and easy. Just take a basket or a container of sorts that will sit stable, and place pom poms, ping pong, wiffle ballls, golf practice wiffle balls, plastic army men or animals (hard plastic), plastic rings and bracelets as long as no glue or glitter (use common sense when purchasing), and straws, you can cut smaller or you can spiral them through a manual pencil sharpener (some of these items can be strung with craft lace or fleece to make hanging toys).
Baby or toddler toys like from Fisher Price or Little Tikes can be used as well. Make sure they do not have areas that could cause a glider to get stuck or injured if using in cage (unsupervised play). These can be found cheaply at yard sales or thrift stores.
I'm sure I've missed stuff, but it's really a lot of versatility, so enjoy researching and planning.