The picture below shows the arduino open-source electornics prototyping platform based on flexible and affordable hardware. It is intended for artiists, designers, hobbyists and anyone interested in creating interactive objects or environments.
It can sense the environment (salinity, temperature, light sensor etc) and can be programmed to react to those sensors. If there is enough interest in this, Bitstop Inc can invite an evangelist to Dagupan to demo how to solder, assemble and program this device. Just leave your feedback here.