If you can get hold of a green laser to outline the milky way and point to some easily seen eyeball stuff (LMC and explain what it is, how far away etc, etc), that is always a buzz for them. 1st rule though is, no-one, not even the adults are allowed to use the laser! And not just for safety reasons, if one has a go, they all want to have a go and the night gets out of hand
