Long Flex sensor POL_12V High-Power (HP) 25D mm Gearmotors a low duty cycle drives

a low duty cycle drives the motor in one direction and a high duty cycle drives the motor in the other direction

the 24v14 motor driver shield

Improved sensitivity over voltage-divider analog output

5mm headphone jack

allows the Leonardo to be cheaper and simpler to use

Long Flex sensor POL_12V High-Power (HP) 25D mm Gearmotors a low duty cycle drivesThis sensor can detect flexing or bending in one direction. They were popularized by being used in the Nintendo PowerGlove as a gaming interface. These sensors are easy to use, they are basically resistors that change value based on how much they're flexed. If they're unflexed, the resistance is about ~10K. When flexed all the way the resistance rises to ~20K. They're pretty similar to FSRs so following this tutorial will get you started . You can use