AttachRyan Clarke from the Parallax support forums is hacking the Sharper image chimp head – “Getting the skin off isn’t that bad…it’s a stubborn rubber cement type glue…Opening the skull only requires the removal a few screws in the back of the skull…the two touch sensors on the back part of the skull (top and back of head) are the only wires you need to be careful of when opening the skull…The touch sensors scope out in a very similar fashion to the flexiforce sensors (Parallax part #30056). Running the flex sensors in the same circuit with the same code as the FlexiforceSimple.BS2 (available on the product page above) you get a distinct 0 or 1 for output (with a bit of button bounce at the beginning of a press)- It does not appear as though the sensors will be useful for ‘analog’ input proportional to the strength of the touch, but I have not verified this as of yet.” Link.