More classroom time today, and this time a visitor from Watercare lead the children through an experimental process that involved them trialling materials to filter gunk out of water. It was a brilliantly fine and hot autumn day, so perfect to be outside playing with water.
Personally I was amazed at the end results. If I remember correctly the best 'filters' were sand and cotton wool - the water was amazingly clear, considering it started like what was in the bucket here. Not that I would be drinking it any time soon!