He had an old baby stroller and an angle grinder tool. Just a few minutes and a self made lawnmower appears. Also a video inside.
He made a piece of wood, make a few holes and used some cable ties to mount it.
With another zip tie he mounts an electric tool on the piece of wood.
Then inserted a plastic line into a rotating head so that it can rotate with great speeds and chop the grass off.
Then he took old broken hockey stick and mounted it on the wooden base plate to use as a handle.
And was very satisfied with the machine he got. In just under an hour fully functional lawnmower from the scrap pieces he had.
Also here is the video of the process and final product: