erupting volcano birthday cake

Step 4 Making it vibrate

I took a motor for a power wheels jeep, welded a clamp and offset counterweight. It had to be clamped very securely to the box to transfer all of the vibrations. The motor was powered by a 12v power supply. The power supply for this and all other electric devices were switched on by a remote control that is used for Christmas tree lights.

This worked awesome and actually shook the whole table the cake was sitting on.