Make sure to either get a Stealth Wheel or a Wodent Wheel. Those are the only two suggie safe wheels, though I suggest the Stealth over the Wodent.
You can find links to both sites that sell these here:
http://glidergeek.weebly.com/important-links.html
As far as toys, there isn't much you can MAKE per se, but there are things you can combine to make neat toys.
My gliders love monkeys in a barrel, army men, mardi gras beads hanging from the top of the cage, cat balls with a bell inside (be sure it's cat nip free), bird toys, etc.
You can also take a plastic container and put Easter eggs or whiffle balls inside, leaving treats in the container or even inside the eggs, not closing the eggs completely, and they go to town. It's like a treasure hunt.
Hit up the dollar store. Check out what's there. Think in terms of what's safe. Can they chew pieces off? Anything at all harmful? That's what I do when I go shopping for them.
Good luck.