My favourite was "Painting with Infrared" where you had a bit paintbrush type gadget which you clicked over a laser colour (red, yellow, green, blue) and then you started painting the wall with the laser - I thought that was super cool. I know Sienna loves painting rainbows so I suggested she have a go at that because she could use all the colours and not have to think of something to draw bearing in mind people are lined up waiting while the drawing is going on. I came back to it later and drew the word Mum.
There were lots of interesting things there and it was a happy, fun morning. Here's a few pictures from our time at "Playing with Light".