I'm making a whack-a-mole game using LABView and Ni-USB 6008. I'm planning to use LEDs to replace moles popping out and strain gauge sensors as the whacking input, which will then be sent to my program using USB-6008. can anyone tell me if its possible and recommend some strain gauge sensors? thanks

 

For your application, piezo sensors would be much easier (and lots cheaper) to implement - http://en.wikipedia.org/wiki/Piezoelectric_sensor

Many are available for $1.00.