To prepare for Breeding or just introducing your gliders is a VERY hard, LONG step. Of course, it varies with all gliders, but I have only found it to be one of the most hard things to do with a glider!
You need two cages, one for the mated pair of gliders & then the joeys. (You cannot keep a son or daughter with its mother or father!) Inbreeding is a VERY big no no!!! Breed to better the species not to be an irresponsible breeder!
You also then will need all other supplies for the other cage as well.
A very important thing you need is information!!! Be sure to do a lot of research before you decide to breed. (Or just get one!)
Be prepared to spend a lot of time with your gliders. They need a lot of time spent with them in order to make & keep them tame!