Mojo goes through phases. A type of toy that was a favorite last month will get completely ignored this month but then be the only toy he wants to play with the next. The only toy he really consistantly plays with is similar to the one in the picture below. It stays in his cage and I usually come home to him hanging upside down on it having a great time.

Any type of soft wood (like Bird Kabob toys) gets destroyed in minutes. Every time one of those come home it's the only thing that exists in Mojo's eyes until it's completely destroyed and scattered all over my floor.
Pele's favorite toy is her bell. It's hung on three large rings that are linked together and I always hear her playing with it. I haven't been able to really find much else that she consistantly likes besides destroying her rope and wacky wood perches. She also loves chewing on sheets of paper. I'm pretty sure she'd be content with only having her bell in her cage though!