英语翻译
have you ever been in a crowd at a football match and wished you were much taller?don't worry about it now .a home-made periscope could be the answer to your wish.
this is what you do...
1) look at the diagram ,and draw the shape onto your card and cut it out
2)fold along the lines and use stickly tape to tape them.
3)put one mirror on the top and another mirror at the bottom ,facing each other.
4)now use your periscope to see around corners and over wall.
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