3. First magnetize the needle. Second, the physiognomy paste with the cork. Third, fill the water container. Fourth we put the cork in the bowl of water and remove all the magnets. First, we magnetize the needle. Second, we paste the needle onto the cork. Third, we fill a container with water. Fourth, we put the cork in the bowl of water and remove the magnet.

6. work done by Pepe Falcon, Clara, Carmen and Antonio.