I just bought the cage my gliders used to live in from their previous owner, it's a lot bigger than the one they are in now and I think they'll be happy to have all their old stuff back. However their 2 joeys are about 3 days OOP and I'm wondering if I should keep them in the smaller home for a while to keep an eye on them or if it would be stressful at all to move the family (mom,dad, and babies) to another cage right now?

If you do swap, make sure not to change any bedding or toys, leave everything dirty with their scent so they don't stress.

Personally i would wait until the joeys are 2 weeks OOP. You don't want mom and dad distracted by the cage, feeling like they need to rescent everything. If mom is a first time mom i would be cautious.

They will be spending most of their time in the pouch with the joeys for the first 2 weeks, anyway.