I'm surprised this hasn't turned up here.
http://www.forbes.com/sites/marcwebe...hree-year-old/
I've always been suspicious of cheap electronics but one example they find here is beyond bad.
When my son was little I had a two pistol safe with a mechanical simplex lock bolted under the bed. The way that you could do a combo of multiple presses made it real hard to work out. It was heavy gauge and tight so there was noting to get a pry bar into. When my son got bigger it went to a friend with little kids, one autistic.
Steve