Try this science experiment with children over the course of several days. Fill up 4 vases with different coloured water and put 1 white carnation in each one. Watch the flowers over the next four days change to the colour of the water.
Pontcysyllte Aqueduct, nr Wrexham in Wales. One of the major engineering triumphs of Thomas Telford's remarkable career, The Pontcyslite Aquaduct carries the Shropshire Union Canal across the River Dee. The aquaduct is 127 feet above the valley floor