A basic plate or switch which makes noise when pressed
An alarm plate is a basic switch which will activate when pressed. the materials you'll need are listed below.
1. peices of plastic or wood i used wood.
2. sponge or foam
4. A few wires.
5 a battery compartment. it is nice to use more than 3 batteries if you use the sound amplifier.
6. motor or any sound making device.