I don't animate by a loooong time. My first animation to the way back to the hobby.
http://heavenanims.deviantart.com/art/Yoyo-combo-I-guess-426330732
CnC I'll help ALOT!

The slo-mo's look awkward, try to give the sticks more movements even while slowed, like don't just tween them statically, and instead tween, not only their whole bodies, but also individual limbs.

Also, the yo-yo physics are off a bit, other people can explain this one better.