Like innumerable children with imaginations fired by animated films, Hong Kong product and graphic designer Ricky Ma grew up watching cartoons featuring the adventures of robots, and dreamed of building his own one day.

Unlike most of the others, however, Ma has realized his childhood dream at the age of 42, by constructing a life-size robot from scratch on the balcony of his home.

The fruit of his labors of a year and a half, and a budget of more than $50,000, is a female robot prototype he calls the Mark 1, modeled after a Hollywood star whose name he wants to keep under wraps but appears to be Scarlett Johansson. It responds to a set of programmed verbal commands spoken into a microphone.