I know of the PP-1s ,2s and 3s ,not up on how they work ? just other then to inject them with sounds up to 20 to 60 seconds long. I have a few other noise toys that make me wonder if it is possible to inject them with sounds ? This perticular board has a chip that can be changed to other chips ,I'd guess to say that they are about 10 seconds long,My question to someone that might know is ...is there anyway possible that I could erase over these chips and put my own sounds on them simlure to the PP sound boards ? or is it a done deal on these chips ? This is the board in question. thanks Switch Kit