First we cut pipe on an angle and zip tied them to a piece of card board . We made two pulleys, we glued them to the card board . We blew up a balloon, we found a plastic bottle, we tied string to the bottle and the other end to the balloon.We nailed four nails to the card board. We used a sinker at the top of the pipe we put the sinker down the pipe, it landed in the bottle. The pulleys pulled up the balloon and POP! The balloon popped in the box on the four nails. BY Liam Tristan and Sam.
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