I really think a sensible adult in charge of the laser would be fine.
I wouldn't even let a child have a laser.
Dan has so much fun with the laser - adores to smack his paw very hard on it (laser is then swtiched off) - he lifts his paw slowly - oh yeah no red light - it's dead. Four seconds later switch laser back on and he starts again to chase it like a lunatic. The same thing is repeated - tirelessly!! And we are careful the light isn't reflected off a polished surface.

Lynne