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A group or individual challenge which you can set for a session or over a set time. The challenge is using the materials provided or limited to (eg only paper and card), to design and build an object that will stay airbourne for more than 15 seconds. This is harder indoors as you have less opportunity to use height to give an advantage.
Think about using/allowing items such elastic bands, balsa wood, paper, tissue paper, glue, sellotape, etc)
