wel u cant realy do a lot wrong for that amount of money
But i stil seriously doubt this pen wil emit anything near 100 mw of green light.
Its probably more like 30-50 mw green max and 50-70 mw of unfilterd ir from the pump diode
And you have around 100mw or with 1 lithium 10440 maybe 120mw, this can do something! (besides looking good) :
Stick the skin maybe light brown match if the laser is in a good mood.
Normaly pop black ballons not to far away.