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Draught TesterMade by IVAN

Purpose, Materials and ProcedurePurpose: To test that is your draughty and how draughty it is.Materials: A cling film, pencil and tapeProcedure: 1.Cut a piece of cling film with the size of 14cm width and 20 cm long. 2.Use tape and stick the width on the pencil then youre finish. Note: Handle the cling film extra careful. Once it have stick together, it cant be returned and youll need a new one

Conclusion and the Big IdeaObservation: when I put the draught tester on the window,It didnt move much, so it means my house dont have draughts. If your house had draughts, it would probably move as if wind is blowing it. Conclusion: I figure out how this thing works. When it is draughty your window frames may slowly disappear letting a small amount of wind come in, you may not feel it but if you put light, easily bended object like the cling film it will be blown so you can know how draughty your house is.