requirement:
  1. can hold 2kg
    1. so, we have to use very light materials
    2. use 
  2. has a voile
    1. we need a stick
    2. we use mask as voile
    3. mask could use glue to stick on the stick.
  3. ------------------------------------------
  4. has floor to hold the stick
    1. find a meterial (got it already from Rona Gabage)
    2. cut to a rectandle.
-- simon 15:54 17/04/2021

 Plan1
  1. use the white thing as boat
  2. use the blue thing as floor
  3. put a stick trops as the pole
  4. use the mask as the voile
  5. use the two bottle as leveler (we can adjust the weight to optimize the balance performance.....)
-- simon 18:19 18/04/2021

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