This doesn't seem very realistic. Looking at the tires of they're robot, it would be almost impossible to manoeuvre on that kind of surface. If you look at Leg

This doesn't seem very realistic. Looking at the tires of they're robot, it would be almost impossible to manoeuvre on that kind of surface. If you look at Lego vehicles for example, they all have to have disproportionately wide wheels to be able to navigate the studs on the bricks without getting caught. In addition, there are the problems of forming non-rectangular and non 90 degree walls anywhere in the house, the problem of recognising and targeting the bricks correctly with the robot, the 'spray on' cement that seems a fantasy.