If you're a parent, then odds are you can attest to the fact that there's a few different ages your children reach where they almost suddenly become... well, let's just say difficult.
The terrible-twos is pretty much a universally acknowledged phase all kiddos go through, and don't even get me started on the sass of a four-year-old. But is there one specific age where all children become just about impossible to handle?
As it turns out, yes, there most certainly is.