The snaps are the switch, attached to conductive thread that goes up through the tentacles.
This is the first configuration, with the vibrating motor and the battery pack in place. But two things happened here. One, I learned that when the motor spins inside a stuffed creation--poly fibers wind up on the motor. The other thing was it is easy to break something this small.
This is how the motor compares to an eXacto knife blade. The wires are very short. I think when I was working with this and trying to strip an end of the wire to have enough exposed wire to work with, I pulled too hard and broke the wire inside the motor. Once I got it installed in the toy--it would only work if I held the motor at a certain angle. That was frustrating and I put the project away for a while.
So I bought a "bigger" motor with longer leads. This one needed 3-volts to operate, so I had to get a different battery pack as well.
I used the straw to create a casing to protect the motor from the polyfil stuffing.
So here is the new set up wired into the octopus.
But, when I put it all together and snapped the tentacles together, it didn't do anything except buzz.
It did however briefly attract the intended audience...