Cement mixers

These beings, very much alive can be seen occasionally. They are, of course, alive, because they obey the seven characteristics of life. Id Est, they move (along the road), they consume (raw materials of cement), they excrete (cement), they respire (combustion of petrol), they detect their surroundings (for instance, putting a nail in the tyre makes it go down to protect itself), they grow (because you see large ones and baby ones, so they must grow) and they reproduce. So there you are, cement mixers are most definitely alive, more so even than Arnold Barton, famous sellotape dispenser.