Originally Posted by hellosailor
More of an issue that kids sometimes play rough--and wouldn't be aware of puncturing a PFD.
That's definitely a consideration and, again, an argument for the fail-safe foam pfd for kids.
As far as USCG approval goes, the issue is not so much whether the pfd is effective or not, but more to do with compliance. Most states (and, where the state does not, the USCG) require children younger than a certain age to wear a USCG certified pfd while underway.
Obviously not a primary consideration for folks operating outside of U.S. jurisdiction, although the Canadian regs seem to mirror very closely the U.S.