From user Herr Döktor:
"Having watched TV’s ‘Doctor Who’ on saturday, I thought it might be nice to make a Sonic Cane like his.
So, having a spare 11th Doctor sonic, an old pool cue, a 60mm plastic sphere and a long weekend to hand, I thought I’d make one.
Works just like the one on the show, only real difference is mine has a taper, whereas the one on TV was straight.”
See more here.