Two of the world's strongest kids show off their muscles and moves

(CBS) - Giuliano and Claudiu Stroe from Galati, Romania, are two kids you definitely don't want to ever mess with on the playground. Take a look as they show off their muscles and moves.

While the brothers, aged 7 years-old and 5 years-old, are undoubtedly very strong (just look at young Giuliano doing the human flag to leave behind any doubts), there has been some criticism and concern over the level of training they've been doing at such young ages.  So what are your thoughts? Leave me some comment love below to let me know.