To carry on our learning of filtration, Y5 made their own filtration systems. We used pop bottles (which were kindly donated), cut them in half and poked holes in the lid. Then we added the layers talking about why each layer is needed.
The materials we used were cotton wool, charcoal, sand, small stones and then large stone. We were impressed by how clean it made the water!
Warning! Do not drink the water if you try this at home