Electricity is made up of very small blobs called electrons which cannot be seen with our eyes alone. These electrons do not like each others company at all and try to push each other as far away as possible Because of this it can be thought that they are negative towards each other and it is said that they have a negative charge. When too many electrons are trapped together on something the thing that they are stuck on is said to be negatively charged. Things which do not have enough electrons on them are said to be positively charged. Although electrons are exceedingly small it is possible to see them push negatively charged things away and pull positively charged things closer. We will use a balloon to hold the electrons and use their invisible electric force to push and pull some things about. For these fun experiments you will need the following 1 A long balloon 2 Some tissue paper 3 A pair of scissors 4 A kitchen tap 5 An empty drinks can 6 A kitchen or dining table 7 A head of hair - yours will be perfect First blow up the balloon and make a tight knot to hold the air in. Cut up the tissue paper up into small pieces and place these on a table. Rub the balloon through your hair really quickly then slowly bring the balloon up close to the bits of tissue paper. The tissue paper will jump to the balloon off the table and then jump off the balloon as soon as it touches it. This happens because rubbing the balloon makes the electrons from your hair stick to it so it has too many and is negatively charged. The tissue paper has lots of space for the electrons to go to and is positively charged so it is pulled by the electrons on the balloon. Once the tissue paper is on the balloon electrons move onto it and so it then becomes negatively charged and is then quickly pushed away. Now place the empty drinks can on its side on the table. Rub the balloon again through your hair and then without touching the can bring the balloon close to it. The can will start to move towards the balloon. Can you guess why this happens Finally run the kitchen tap so that a very fine stream of water comes out of the tap. Once again rub the balloon through your hair and slowly approach the stream of water halfway between the tap and the sink. Make sure the balloon does not touch the water. What happens to the stream of water Can you think why Electric Balloons Little E insteins C orner hair and slowly approach the The team at the university discovered that mixing the seeds of the pawpaw with kaolinite clay in a nitrogen atmosphere at an elevated temperature created a very effective agent for removing micro-pollutants hydroxyl and carboxyl ions as well as heavy metals from wastewater down to levels below those recommended by the World Health Organisation making the water safe to drink. All the essential materials are readily available and inexpensive giving merging economies a source of clean water that impacts on national health which is an essential factor for economic growth and prosperity. Along similar lines engineers in Malaysia have tackled the problem of removing water contaminated with mercury. This time however instead of the pawpaw seed they resorted to using the pith of... coconuts. By mixing coconuts with activated carbon and using this to clean wastewater contaminated with the cancer-inducing organic and inorganic salts of mercury they came up with a cost-effective means of giving poorer economies access to water quality which to date has been reserved for progressive economies. So it seems that the Bare Necessities and a Lovely Bunch of Coconuts are all one needs if one is to get a clean drink of water anywhere in the world.