I saw some green lasers on dealextreme recently, they have units that go up to 200 mW: http://www.dealextreme.com/details.dx/sku.1997 This thing looks a bit unsafe to me! My intention is to show the daughters some stars here in our polluted skies, not much else. How much power is needed for that? How much is dangerous? I will be the only one handling the device, so I am not concerned with someone pointing the laser at their friends' eyes (I treat the tool like a firearm). Thanks for any advice. Moderator note -- Laser pointers are dangerous; please use with extreme care. See warning.