Emma Pharo from  UTas (via Twitter) urges visitors to muck around with the “augmented reality sandpit” on OD this Sunday.   “Say what?” you say (oh go on).  It’s white sand which becomes a screen for a programmed projector above, with motion sensors which beams topographic lines on to the sand as users make their own landscapes. Put your hand over the landscape it make it rain.  Super-useful for learning topography and hydrology – and playing god, which is undoubtedly not the reason VC Rufus Black, is said to have found it “mesmerising.”