Nandi Mtethwa

Automatic plant watering system using used plastic bottles that collect rain water and a filter plug that regulates the amount of water dripping at any time

Miniature wind mill power bank powered by the wind power of a fast moving vehicle and used to recharge devices

Automatic water dispensing system for a pet(dog), when it steps on the plank the tap takes out water into the bowl and stops when the pet steps off the board