Tell us about yourself!
I hadn't see that set yet. Looks like it would fit into a racket ball fine. I'm interested to see how this unfolds, it's going to be quite something to pack all that stuff in a little ball.
With the inductive charging, I'm mainly thinking of the hardware I have. On the pad the coil is glued flat to a ceramic tile. If the coil could be formed around the curvature of the ball I think you would be all set. Think whether this is difficult or not has to do with the diameter of the coil. With BB8 it looks like the coil is only as wide as a shallow part of the ball. With a racket ball you might need a smaller coils.
Interface Python and Arduino with pySerial
Electromechanical Insect or Flapping Oscillator
The Arduino PS/2 Keyboard Smart Interface
Datalogging to Dropbox with Arduino Yun
Photography lights on a budget