Huh? I see Kinder Eggs for sale - including for kids - and there are laws against endangering kids leaving loaded guns lying around.
The US does have ridiculously under-regulated guns, but those examples are wrong in trying to prove it.
The gun store that over 500 AK-47s to Mexican Cartels - and the lack of any need to even report the sale of such rifles - that's under-regulation.
Myth: The United States is the source of 90% of drug syndicate guns in Mexico
Fact: This is an often misquoted data point from the BATFE, who said 90% of the firearms that have been interdicted in transport to Mexico or recovered in Mexico came from the United States. Thus the 90% number includes only the firearms American and Mexican police stop in transport.70
Fact: The original number was derived from the number of firearms successfully traced, not the total number of firearms. For 2007-2008, Mexican officials recovered approximately 29,000 firearms from crime scenes and asked for BATFE traces of 11,000. Of those, the BATFE could trace roughly 6,000 of which 5,114 were confirmed to have come from the United States. Thus, 83% of the crime guns recovered in Mexico have not been or cannot be traced to America.71
Fact: Mexican drug syndicates can buy guns anywhere. For the relatively underpowered civilian rifles coming from the United States, drug runners would pay between 300% and 400% above the market price. Thus they can and are buying guns around the world.72
Fact: Mexican drug cartels – with a $40 billion in annual revenues – have military armament that includes hand grenades, grenade launchers, armor-piercing munitions, antitank rockets and assault rifles smuggled from Central American countries.73 These are infantry weapons bought from around the world and not civilian “assault weapon” rifles from the United States.
Myth: Thousands of guns go into Mexico from the U.S. every day
Fact: In Senate Committee testimony, the BAFTE said the number was likely at worst in the “hundreds”.75 For 2007 and 2008, the average for all seizures was closer to 40 per day (29,000/730), only a fraction of which came from the USA by any means.
Myth: Mexico seizes 2,000 guns a day from the United States
Fact: The Mexican attorney general’s office reports seizing 29,000 weapons in all of 2007 and 2008, or about 14,500 a year. And that is all weapons, regardless of country of origin.74 Had they seized approximately 2,000 per day, the total number of seized guns would be closer to 1,460,000.
http://gunfacts.info/pdfs/gun-facts/5.1/gun-facts-5.1-screen.pdf