ssppmm

my list is 1.heat engine 2.powerless vacuum cleaner 3.pneumatic operated robotic arm 4.automatic thread cutting machine 5.pneumatic lifter 6.pneumatic reveting machine 7.pneumatic bending machine 8.magnetic seperater.. please help me which...

hello friends... can anybody give me the list of Pneumatic related mini projects?? i am little confused while selecting them...