Nah, you cant guarantee a pointer getting through customs, I've tried once and they took it.
Either read like mad to learn how to build one or get one locally.
Laser Pointers | OzLasers Check this place out though, I have a friend who bought one of the green pen lasers and lets just say its a bit more than 1mW :shhh: Id guess more than 30mW for the green pointer. Enough to see the dot in the daytime.
But if you want more than that I'd look at building one.