Half a croissant, on a plate, with a sign in front of it saying '50c'
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science: energy: piezoelectric
Ideas are sorted alphabetically.
Ideas in bold have been created this week.
 (+2, -1)  Eccomat 
   Elephant electricity 
   Jumping Solar Panels 
 (+5, -3)  Pedometer Powered Mobile Phone 
 (+1, -3)  Pidgeon/Window Generator 
   Piezo Ball 
 (+7, -5)  Piezo-electric Waterfall 
 (+1)  piezo motorway (freeway) 
 (+4, -2)  Piezo Train Tracks 
   Piezoelectric Batteries 
 (+3)  Piezoelectric Floor 
 (+1)  Piezotunnel 


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