X2 on the bird toys. I have a little mirror with jingle bells hanging on the tub, and they looove to launch themselves onto it lol. I'd advise against any toys with bells if they're anywhere near your sleeping space How interested are you in genetic projects with them? If so, I'd make another tub for playing around with genes.

Just a note on the wheel, be careful with the ones that have bars that intersect with the running area. I have one group that tends to fall out, and the others keep running as he gets stuck in the bars and screams. Horrible sound, hope to never hear it again. And now he's got these huge sores on his back, may have to feed him off :/